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  Question 1

Which one of the following pairs of plant structures has haploid number of chromosomes?

A : Egg nucleus and secondary nucleus
B : Megaspore mother cell and antipodal cells
C : Egg cell and antipodal cells
D : Nucellus and antipodal cells


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     Correct answer is : C

     Solution :
      Egg cell and antipodal cells : They are part of the female gametophyte.

  •   Question 2

    What does the filiform apparatus do at the entrance into ovule?

    A : It guides pollen tube from a synergid to egg
    B : It helps in the entry of pollen tube into a synergid
    C : It prevents entry of more than one pollen tube into the embryosac
    D : It brings about opening of the pollen tube


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     Correct answer is : B

     Solution :
      It helps in the entry of pollen tube into synergid : Filiform apparatus is present at the micropylar end in synergid. It is a mass of finger like projections. It releases certain chemical substances which direct the path of pollen tube inside the synergid through micropyle (chemotropic effect)

  •   Question 3

    Unisexuality of flowers prevents

    A : Autogamy and geitonogamy
    B : Autogamy, but not geitonogamy
    C : Both geitonogamy and xenogamy
    D : Geitonogamy, but not xenogamy


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     Correct answer is : B

     Solution :
      Autogamy but not geitnogamy : Unisexuality promotes or favours the cross pollination (xenogamy) and prevent self pollination (Autogamy). Geitnogamy involve transfer of pollen grain between two flowers of the same plant so unisexuality will not prevent geitnogamy.

  •   Question 4

    Which extraembryonic membrane in humans prevents desiccation of the embryo inside the utrerus?

    A : Amnion
    B : Chorion
    C : Allantois
    D : Yolk sac


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     Correct answer is : A

     Solution :
      Amnion encloses amniotic fluid which prevents dessication of embryo, that's why present in all true land vertebrates

  •   Question 5

    Which one of the following statements is incorrect about menstruation?

    A : The beginning of the cycle of menstruation is called menarche
    B : During normal menstruation about 40 ml blood is lost
    C : The menstrual fluid can easily clot
    D : At menopause in the female, there is especially abrupt increase in gonadotropic hormones


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     Correct answer is : C

     Solution :
      Menopause is a senile change in ovaries. After menopause the level of pituitary gonadotropins remain same or slightly increase. FSH is more than LH; but the ovaries are not responding to these hormone, because all the ovarian follicles are converted into follicular atresia. There is decline in the level of progesterone and estrogen. Initially the blood inside the uterus clots, but it is liquefied by the enzyme plasmin released by uterus. Menstrual fluid which is discharged cannot clot again

  •   Question 6

    The haemoglobin of a human foetus

    A : Has a higher affinity for oxygen than that of an adult
    B : Has a lower affinity for oxygen than that of the adult
    C : Its affinity for oxygen is the same as that of an adult
    D : Has only 2 protein subunits instead of 4


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     Correct answer is : A


  •   Question 7

    Consider the statements given below regarding contraception and answer as directed thereafter (a) Medical Termination of Pregnancy (MTP) during first trimester is generally safe
    (b) Generally chances of conception are nil until mother breast-feeds the infant upto two years
    (c) Intrauterine devices like copper-T are effective contraceptives
    (d) Contraception pills may be taken upto one week after coitus to prevent conception
    Which two of the above statements are correct?


    A : a, b
    B : b, c
    C : c, d
    D : a, c


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     Correct answer is : D

     Solution :
      During intense lactational period the chances of conception are almost nil, maximum upto six months and not two years. After unwanted sexual intercourse, conception can be avoided by taking contraceptive pills within 72 hrs.

  •   Question 8

    In human adult females oxytocin

    A : Causes strong uterine contractions during parturition
    B : Is secreted by anterior pituitary
    C : Stimulates growth of mammary glands
    D : Stimulates pituitary to secrete vasopressin


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     Correct answer is : A

     Solution :
      Oxytocin is called as Birth Hormone as it causes the contraction of smooth muscles of the uterus leading to the birth of the child.

  •   Question 9

    Which one of the following is the correct percentage of the two (out of the total of 4) green house gases that contribute to the total global warming?

    A : Methane 20%, N2O 18%
    B : CFCs14%, Methane 20%
    C : CO2 40%, CFSs 30%
    D : N2O 6%, CO2 86%


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     Correct answer is : B

     Solution :
      CFC 14%, methane 20% : For CO2 it is 60% and for N2O it is 6%

  •   Question 10

    Quercus species are the dominant component in

    A : Tropical rain forests
    B : Temperate deciduous forests
    C : Alpine forests
    D : Scrub forests


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     Correct answer is : B


  •   Question 11

    About 70% of total global carbon is found in

    A : Forests
    B : Grasslands
    C : Agroecosystems
    D : Oceans


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     Correct answer is : D


  •   Question 12

    Which one of the following is not observed in biodiversity hotspots?

    A : Species richness
    B : Endemism
    C : Accelerated species loss
    D : Lesser inter-specific competition


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     Correct answer is : D

     Solution :
      Lesser inter-specific competition : Due to the presence of high species diversity the inter specific competition will be more enhanced.

  •   Question 13

    World summit on Sustainable Development (2002) was held in

    A : South Africa
    B : Brazil
    C : Sweden
    D : Argentina


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     Correct answer is : A

     Solution :
      It was held in South Africa (Johnnesberg)

  •   Question 14

    The slow rate of decomposition of fallen logs in nature is due to their

    A : Low cellulose content
    B : Low moisture content
    C : Poor nitrogen content
    D : Anaerobic environment around them


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     Correct answer is : B

     Solution :
      Low moisture content will lead to decrease in number of decomposers, because decomposers require an optimum moisture for their proper growth and functioning.

  •   Question 15

    Consider the following statements concerning food chains
    (a) Removal of 80% tigers from an area resulted in greatly increased growth of vegetation
    (b) Removal of most of the carnivores resulted in an increased population of deers
    (c) The length of food chains is generally limited to 3-4 trophic levels due to energy loss
    (d) The length of food chains may vary from 2 to 8 trophic levels.
    Which two of the above statements are correct?


    A : a, b
    B : b, c
    C : c, d
    D : a, d


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     Correct answer is : B

     Solution :
      Removal of tigers from an area will lead to an increase in number of herbivores and hence there will be decreased growth of vegetation in that particular area. The number of trophic levels in a food chain does not reach 8 rather there are 3 or 4 trophic levels.

  •   Question 16

    According to Central Pollution Control Board (CPCB), which particulate size in diameter (in micrometers) of the air pollutants is responsible for greatest harm to human health?

    A : 5.2 - 2.5
    B : 2.5 or less
    C : 1.5 or less
    D : 1.0 or less


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     Correct answer is : B

     Solution :
      This is the report of Central Pollution Control Board.

  •   Question 17

    The table below gives the populations (in thousands) of ten species (A - J) in four areas (a - d) consisting of the number of habitats given within brackets against each. Study the table and answer the question which follows
    Which area out of a to d shows maximum species diversity?




    A : a
    B : b
    C : c
    D : d


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     Correct answer is : D

     Solution :
      In areas 'c' and 'd' all the 10 species are present but number of habitats is lesser in area d.

  •   Question 18

    A lake near a village suffered heavy mortality of fishes within a few days. Consider the following reasons for this
    (a) Lots of urea and phosphate fertilizer were used in the crops in the vicinity
    (b) The area was sprayed with DDT by an aircraft
    (c) The lake water turned green and stinky
    (d) Phytoplankton populations in the lake declined initially thereby greatly reducing photosynthesis
    Which two of the above were the main causes of fish mortality in the lake?


    A : a, b
    B : b, c
    C : c, d
    D : a, c


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     Correct answer is : D

     Solution :
      Lots of urea and phosphate fertilizers used in crops in the vicinity of lake will lead to eutrophication that means the lake will turn green and stinky.

  •   Question 19

    Consider the following four statements (a - d) about certain desert animals such as kangaroo rat.
    (a) They have dark colour and high rate of reproduction and excrete solid urine
    (b) They do not drink water, breathe at a slow rate to conserve water and have their body covered with thick hairs
    (c) They feed on dry seeds and do not require drinking water
    (d) They excrete very concentrated urine and do not use water to regulate body temperature
    Which two of the above statements for such animals are true?


    A : a and b
    B : c and d
    C : b and c
    D : c and a


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     Correct answer is : B

     Solution :
      Kangaroo rat is the only mammal which does not ingest any water and reamains only on metabolic water which it can utilize due to nasal counter current mechanism. It feeds on dry castor seeds. Sweat glands are absent and secrete concentrated urine with nitrogenous waste as urea.

  •   Question 20

    A transgeneic food crop which may help in solving the problem of night blindness in developing countries is

    A : Golden rice
    B : Flavr Savr tomatoes
    C : Starlink maize
    D : Bt Soybean


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     Correct answer is : A

     Solution :
      Golden rice is transgenic rice in which the genes for synthesis of enzymes involved in ?- carotene formation are transferred. So golden rice is rich in vitamin A, preventing night blindness.

  •   Question 21

    Bacterial leaf blight of rice is caused by a species of

    A : Erwinia
    B : Xanthomonas
    C : Pseudomonas
    D : Alternaria


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     Correct answer is : B

     Solution :
      Xanthomonas oryzae

  •   Question 22

    Which one of the following is linked to the discovery of Bordeaux mixture as a popular fungicide?

    A : Black rust of wheat
    B : Bacterial leaf blight of rice
    C : Downy mildew of grapes
    D : Loose smut of wheat


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     Correct answer is : C

     Solution :
      It was discovered by Professor Millardet of Bordeaux University of France.

  •   Question 23

    Which one of the following is being tried in India as a biofuel substitute for fossil fuels?

    A : Aegilops
    B : Jatropha
    C : Azadirachta
    D : Musa


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     Correct answer is : B

     Solution :
      It is a petroplant and the source of fuel is latex.

  •   Question 24

    Trichoderma harzianum has proved a useful microorganism for

    A : Biological control of soi-borne plant pathogens
    B : Bioremediation of contaminated soils
    C : Reclamation of wastelands
    D : Gene transfer in higher plants


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     Correct answer is : A

     Solution :
      It secretes chitinase enzyme which is responsible for antifungal activities

  •   Question 25

    Gel electrophoresis is used for

    A : Isolation of DNA molecule
    B : Cutting of DNA into fragments
    C : Separation of DNA fragments according to their size
    D : Construction of recombinant DNA by joining with cloning vectors


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     Correct answer is : C

     Solution :
      After the action of restriction endonuclease the fragments of DNA so formed are separated by gel electrophoresis. This technique is based upon the principle of separation of molecules on the basis of charge and mass.

  •   Question 26

    To which type of barriers under innate immunity, do the saliva in the mouth and the tears from the eyes, belong?

    A : Physical barriers
    B : Cytokine barriers
    C : Cellular barriers
    D : Physiological barriers


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     Correct answer is : D

     Solution :
      Acid in stomach, saliva in mouth, tears from eyes all prevent microbial growth. They are part of innate immunity and grouped under physiological barriers.

  •   Question 27

    Match the disease in Column I with the appropriate items (pathogen/prevention/treatment) in Column II




    A : a-(ii), b-(iii), c-(iv), d-(i)
    B : a-(i), b-(ii), c-(iii), d-(iv)
    C : a-(ii), b-(iv), c-(i), d-(iii)
    D : a-(ii), b-(i), c-(iii), d-(iv)


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     Correct answer is : A


  •   Question 28

    Consider the following statements about biomedical technologies
    (a) During open heart surgery blood is circulated in the heart-lung machine
    (b) Blockage in coronary arteries is removed by angiography
    (c) Computerised Axial Tomography (CAT) shows detailed internal structure as seen in a section of body
    (d) X-ray provides clear and detailed images or organs like prostate glands and lungs
    Which two of the above statements are correct?


    A : a and b
    B : b and d
    C : c and d
    D : a and c


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     Correct answer is : D

     Solution :
      Angioplasty not angiography is unblocking of blocked arteries. Radiograph produced by x-rays is just a shadow of the dense body parts.

  •   Question 29

    Which one of the following pairs of codons is correctly matched with their function or the signal for the particular amino acid?

    A : UUA, UCA - Leucine
    B : GUU, GCU - Alanine
    C : UAG, UGA - Stop
    D : AUG, ACG - Start / Methionine


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     Correct answer is : C

     Solution :
      UAA, UAG and UGA are nonsense or terminating or stop codons as these are responsible for the termination of translation.

  •   Question 30

    Which one of the following is the correct statement regarding the particular psychotropic drug specified?

    A : Barbiturates cause relation and temporary euphoria
    B : Hashish causes after thought perceptions and hallucinations
    C : Opium stimulates nervous system and causes hallucinations
    D : Morphine leads to delusions and disturbed emotions


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     Correct answer is : B

     Solution :
      Morphine is both a sedative as well as analgesic drug. Barbiturates are sedatives and have hypnotic effect. Opium is also a narcotic drug which has a depressing effect on CNS.

  •   Question 31

    Cry 1 endotoxins obtained from Bacillus Thuringiensis are effective against

    A : Boll worms
    B : Mosquitoes
    C : Flies
    D : Nematodes


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     Correct answer is : A

     Solution :
      Proteins encoded by the genes cry I Ac and cry II Ab control cotton bolloworm.

  •   Question 32

    Modern detergents contain enzyme preparations of

    A : Thermophiles
    B : Acidophiles
    C : Alkaliphiles
    D : Thermoacidophiles


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     Correct answer is : B

     Solution :
      Enzymes used in detergents are proteases and lipases, which are obtained from fungi. Fungi grows properly in acidic medium.

  •   Question 33

    The linking of antibiotic resistance gene with the plasmid vector became possible with

    A : Exonucleases
    B : DNA ligase
    C : Endouncleases
    D : DNA polymerase


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     Correct answer is : B

     Solution :
      Restriction endonucleases act as molecular scissors; but DNA ligases help in linking foreign DNA to plasmid.

  •   Question 34

    Which one of the following proved effective for biological control of nematodal disease in plants?

    A : Paecilomyces lilacinus
    B : Pisolithus tinctorius
    C : Pseudomonas cepacia
    D : Gliocladium virens


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     Correct answer is : C


  •   Question 35

    Main objective of production/use of herbicide resistant GM crops is to

    A : Reduce herbicide accumulation in food articles for health safety
    B : Eliminate weeds from the field without the use of manual labour
    C : Eliminate weeds from the field without the use of herbicides
    D : Encourage eco-friendly herbicides


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     Correct answer is : B

     Solution :
      As herbicide resistant GM crops will remain unaffected to the herbicide used, while the weeds will get killed.

  •   Question 36

    Consider the following four measures (a - d) that could be taken to successfully grow chick-pea in an area where bacterial blight disease is common
    (a) Spray with Bordeaux mixture
    (b) Control of the insect vector of the disease pathogen
    (c) Use of only disease-free seeds
    (d) Use of varieties resistant to the disease Which two of the above measures can control the disease?


    A : (a) and (d)
    B : (b) and (c)
    C : (a) and (b)
    D : (c) and (d)


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     Correct answer is : D

     Solution :
      Bordeaux is used to control fungal diseases and no insect vector is reported for bacterial blight disease. Thus use of disease free seeds and disease resistant varieties can control disease.

  •   Question 37

    Human insulin is being commercially produced from a transgenic species of

    A : Saccharomyces
    B : Escherichia
    C : Mycobacterium
    D : Rhizobium


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     Correct answer is : B

     Solution :
      Eli Lilly was the first American Company to launch genetically engineered insulin called as humulin. They prepared two DNA sequences by reverse transcription of their m-RNA and linked them separately with the modified plasmid of Escherichia coli.

  •   Question 38

    Cornea transplant in humans is almost never rejected. This is because

    A : It is a non-living layer
    B : Its cells are least penetrable by bacteria
    C : It has no blood supply
    D : It is composed of enucleated cells


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     Correct answer is : C

     Solution :
      Cornea can be easily transplanted because it has no blood supply & therefore, does not involve immune response.

  •   Question 39

    Which of the following pairs of organs includes only the endocrine glands?

    A : Adrenal and Ovary
    B : Parathyroid and Adrenal
    C : Pancreas and Parathyroid
    D : Thymus and Testes


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     Correct answer is : B

     Solution :
      Testes, Ovaries and Pancreas have both exocrine and endocrine functions; but Parathyroid and Adrenals have only endocrine function.

  •   Question 40

    What is antisense technology?

    A : RNA polymerase producing DNA
    B : A cell displaying a foreign antigen used for synthesis of antigens
    C : Production of somaclonal variants in tissue cultures
    D : When a piece of RNA that is complementary in sequence is used to stop expression of a specific gene


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     Correct answer is : D

     Solution :
      Antisense technology is the translational control of protein synthesis which involves use of RNA which is complemantry to m-RNA, inhibiting the expression of genes.

  •   Question 41

    Which one of the following acids is a derivative of carotenoids ?

    A : Abscisic acid
    B : Indole butyric acid
    C : Indole-3-acetic acid
    D : Gibberellic acid


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     Correct answer is : A


  •   Question 42

    Vegetative propagation in mint occurs by :

    A : Sucker
    B : Runner
    C : Offset
    D : Rhizome


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     Correct answer is : A


  •   Question 43

    Which one of the following plants is monoecios ?

    A : Papaya
    B : Marchantia
    C : Pinus
    D : Cycas


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     Correct answer is : C


  •   Question 44

    Foetal ejection reflex in human female is induced by

    A : Differentiation of mammary glands
    B : Pressure exerted by amniotic fluid
    C : Release of oxytocin from pituitary
    D : Fully developed foetus and placenta


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     Correct answer is : D


  •   Question 45

    Which of the following is the correct matching of the events occurring during menstrual cycle ?

    A : Menstruation- Breakdown of myometrium and ovum not fertilized
    B : Ovulation- LH and FSH attain peak level and sharp fall in the secretion of progesterone
    C : Proliferative phase- Rapid regeneration of myometrium and maturation of Grafian follicle
    D : Development of corpus luteum- Secretory phase and increased secretion of progesterone.


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     Correct answer is : D


  •   Question 46

    Which one of the following is the most likely root cause why menstruation is not taking place in regularly cycling human female ?

    A : Retention of well-developed corpus luteum
    B : Fertilization of the ovum
    C : Maintenance of the hypertrophical endometrial lining
    D : Maintenance of high concentration of sexhormones in the blood stream


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     Correct answer is : B


  •   Question 47

    The correct sequence of spermatogenetic stages leading to the formation of sperms in a mature human testis is :

    A : Spermatogonia-spermatid-spermatocytesperms
    B : Spermatocyte-spermatogonia-spermatidsperms
    C : Spermatogonia-spermatocyte-spermatidsperms
    D : Spermatid-spermatocyte-spermatogoniasperms


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     Correct answer is : C


  •   Question 48

    A change in the amount of yolk and its distribution in the egg will effect

    A : Fertilization
    B : Formation of zygote
    C : Pattern of cleavage
    D : Number of blastomeres produced


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     Correct answer is : C


  •   Question 49

    When breast feeding is replaced by less nutritive food low in proteins and calories, the infants below the age of one year are likely to suffer from :

    A : Pellagra
    B : Marasmus
    C : Rickets
    D : Kwashiorkor


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     Correct answer is : B


  •   Question 50

    Which one of the following types organisms occupy more than one trophic level in a pond ecosystem ?

    A : Frog
    B : Phytoplankton
    C : Fish
    D : Zooplankton


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     Correct answer is : C


  •   Question 51

    Which one of the following has maximum genetic diversity in India ?

    A : Tea
    B : Teak
    C : Mango
    D : Wheat


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     Correct answer is : D


  •   Question 52

    Montreal protocol aims at :

    A : Control of CO2 emission
    B : Reduction of ozone depleting substances
    C : Biodiversity conservation
    D : Control of water pollution


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     Correct answer is : B


  •   Question 53

    Chipko movement was launched for the protection of

    A : Wet lands
    B : Grasslands
    C : Forests
    D : Livestock


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     Correct answer is : C


  •   Question 54

    The correct sequence of plants in hydrosere is

    A : Oak - Lantana - Volvox - Hydrilla - Pistia - Scirpus
    B : Oak - Lantana - Scirpus - Pistia - Hydrilla - Volvox
    C : Volvox - Hydrilla - Pistia - Scirpus - Lantana - Oak
    D : Pistia - Volvox - Scirpus - Hydrilla - Oak - Lantana


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     Correct answer is : C


  •   Question 55

    A country with a high rate of population growth took measures to reduce it. The figure below shows age-sex pyramids of populations A and B twenty years apart. Select the correct interpretation about them :



    A : "A" is the earlier pyramid and no change has occurred in the growth rate
    B : "A" is more recent shows slight reduction in the growth rate
    C : "B" is earlier pyramid and shows stabilized growth rate
    D : "B" is more recent showing that population is very young


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     Correct answer is : B


  •   Question 56

    Step taken by the Government of India to control air pollution include

    A : Use of non-polluting Compressed Natural Gas (CNG) only as fuel by all buses and trucks
    B : Compulsory mixing of 20% ethyl alcohol with petrol and 20% biodiesel with diesel
    C : Compulsary PUC (Pollution Under Control) certification of petrol driven vehicles which tests for carbon monoxide and hydrocarbons
    D : Permission to use only pure diesel with a maximum of 500 ppm sulphur as fuel for vehicles


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     Correct answer is : C


  •   Question 57

    Biochemical Oxygen Demand (BOD) in a river water :

    A : Increases when sewage gets mixed with river water
    B : Remains unchanged when algal bloom occurs
    C : has no relationship with concentration of oxygen in the water
    D : Gives a measure of Salmonella in the water


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     Correct answer is : A


  •   Question 58

    DDT residues are rapidly passed through food chain causing biomagnification because DDT is

    A : Water soluble
    B : Lipo soluble
    C : Moderately toxic
    D : Non-toxic to aquatic animals


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     Correct answer is : B


  •   Question 59

    Global agreement in specific control strategies to reduce the release of ozone depleting substances, was adopted by :

    A : The Vienna Convention
    B : Rio de Janeiro Conference
    C : The Montreal Protocol
    D : The Kyoto Protocol


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     Correct answer is : C


  •   Question 60

    Somaclones are obtained by :

    A : Genetic engineering
    B : Tissue culture
    C : Plant breeding
    D : Irradiation Genetic engineering


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     Correct answer is : B


  •   Question 61

    Which one is the wrong pairing for the disease and its causal organism ?

    A : Root-knot of vegetables : Meloidogyne sp
    B : Late blight of potato : Alternaria solani
    C : Black rust of wheat : Puccinia graminis
    D : Loose smut of wheat : Ustilago nuda


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     Correct answer is : B


  •   Question 62

    Which of the following is not used as a biopesticide ?

    A : Xanthomonas Campestris
    B : Bacillus thringiensis
    C : Trichoderma harzianum
    D : Nuclear Polyhedral Virus (NPV)


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     Correct answer is : A


  •   Question 63

    Which of the following plant species you would select for the production of bioethanol ?

    A : Jatropa
    B : Brassica
    C : Zea Mays
    D : Pongamia


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     Correct answer is : C


  •   Question 64

    Which of the following is a symbiotic nitrogen fixer ?

    A : Azolla
    B : Glomus
    C : Azotobacter
    D : Frankia


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     Correct answer is : D


  •   Question 65

    A health disorder that results from the deficiency of thyroxine in adults and characterized by (i) a low metabolic rate (ii) increase in body weight and (iii) tendency to retain water in tissues is :

    A : Cretinism
    B : Hypothyroidism
    C : Simple goiter
    D : Myxoedema


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     Correct answer is : D


  •   Question 66

    Which one of the following statement is correct ?

    A : Malignant tumours may exhibit metastasis
    B : Patients who have undergone surgery are given cannabinoids to relieve pain
    C : Benign tumours show the property of metastasis
    D : Heroin accelerates body functions


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     Correct answer is : A


  •   Question 67

    Which of following is a pair of viral diseases ?

    A : Typhoid, Tuberculosis
    B : Ringworm, AIDS
    C : Common Cold, AIDS
    D : Dysentery, Common Cold


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     Correct answer is : C


  •   Question 68

    A person likely to develop tetanus is immunized by administering :

    A : Weakned germs
    B : Dead germs
    C : Preformed antibodies
    D : Wide spectrum antibiotics


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     Correct answer is : C


  •   Question 69

    Use of anti-histamines and steroids give a quick relief from -

    A : Headache
    B : Allergy
    C : Nausea
    D : Cough


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    .

     Correct answer is : B


  •   Question 70

    Alzhimer disease in humans is associated with the deficiency of :

    A : Gamma aminobutyric acid (GABA)
    B : Dopamine
    C : Glutamic acid
    D : Acetylcholine


  •  
    .

     Correct answer is : D


  •   Question 71

    which one of the following is commonly used in transfer of foreign DNA into crop plants ?

    A : Penicillium expansum
    B : Trichoderma harzianum
    C : Meloidogyne incognita
    D : Agrobacterium tumefaciens


  •  
    .

     Correct answer is : D


  •   Question 72

    The bacterium Bacillus thuringiensis is widely used in contemporary biology as

    A : Source of industrial enzyme
    B : Indicator of water pollution
    C : Insecticide
    D : Agent for production of dairy products


  •  
    .

     Correct answer is : C


  •   Question 73

    Which one of the following pairs is wrongly matched ?

    A : Textile amylase
    B : Detergents lipase
    C : Alcohol nitrogenase
    D : Fruit juice pectinase


  •  
    .

     Correct answer is : C


  •   Question 74

    Polyethylene glycol method is used for :

    A : Energy production from sewage
    B : Gene transfer without a vector
    C : Biodiesel production
    D : Seedless fruit production


  •  
    .

     Correct answer is : B


  •   Question 75

    Transgenic plants are the ones

    A : Grown in artificial medium after hybridization in the field
    B : Produced by a somatic embryo in artificial medium
    C : Generated by introducing foreign DNA in to a cell and regenerating a plant from that cell
    D : Produced after protoplast fusion in artifical medium


  •  
    .

     Correct answer is : C


  •   Question 76

    What is true about Bt toxin ?

    A : The concerned Bacillus has antitoxins
    B : The inactive protoxin gets converted into active form in the insect gut
    C : Bt protein exists as active toxin in the Bacillus
    D : The activated toxin enters the ovaries of the pest to sterillise it and thus prevent its multiplication.


  •  
    .

     Correct answer is : B


  •   Question 77

    The genetic defect-adenosine deaminase (ADA) deficiency may be cured permanently by

    A : Enzyme replacement therapy
    B : Periodic infusion of genetically engineered lymphocytes having functional ADA cDNA
    C : Administering adenosine deaminase activators
    D : Introducing bone marrow cells producing ADA into cells at early embryonic stages


  •  
    .

     Correct answer is : D


  •   Question 78

    There is no DNA in :

    A : Hair root
    B : An enucleated ovum
    C : Mature RBCs
    D : A mature spermatozoan


  •  
    .

     Correct answer is : C


  •   Question 79

    The letter T in T-lymphocyte refers to

    A : Thymus
    B : Thyroid
    C : Thalamus
    D : Tonsil


  •  
    .

     Correct answer is : A


  •   Question 80

    Tiger is not a resident in which one of the following National Park ?

    A : Jim Corbett
    B : Ranthambhor
    C : Sunderbans
    D : Gir


  •  
    .

     Correct answer is : D


  •   Question 81

    Male and female gametophytes are independent and free-living in

    A : Castor
    B : Pinus
    C : Sphagnum
    D : Mustard


  •  
    .

     Correct answer is : C


  •   Question 82

    The biomass available for consumption by the herbivores and decomposers is called

    A : Secondary productivity
    B : Standing crop
    C : Gross primary productivity
    D : Net primary productivity


  •  
    .

     Correct answer is : D


  •   Question 83

    The principal nitrogenous excretroy compound in humans is synthesised

    A : In kidneys as well eliminated by kidneys
    B : In liver and also eliminated by the same throught bile
    C : In the liver, but eliminated mostly through kidneys
    D : In kidneys but eliminated mostly through liver


  •  
    .

     Correct answer is : C


  •   Question 84

    The chief water conducting elements of xylem in gymnosperms are

    A : Fibres
    B : Transfusion tissue
    C : Tracheids
    D : Vessels


  •  
    .

     Correct answer is : C


  •   Question 85

    Injury to adrenat cortex is not likely to affect the secretion of which of the following

    A : Both Androstendione and Dehydroepiandroserone
    B : Adrenaline
    C : Cortisol
    D : Aldosterone


  •  
    .

     Correct answer is : B


  •   Question 86

    The technical term used for the androecium in a flower of China rose (Hibiscus rosa-sinensis) is

    A : Diadelphous
    B : Polyandrous
    C : Polyadelphous
    D : Monadelphous


  •  
    .

     Correct answer is : D


  •   Question 87

    PGA as the first CO2 fixation product was discovered in photosynthesis of

    A : Gymnosperm
    B : Angiosperm
    C : Alga
    D : Bryophyta


  •  
    .

     Correct answer is : C


  •   Question 88

    The main arena of various types of activities of a cell is

    A : Mitochondria
    B : Cytoplasm
    C : Nucleus
    D : Plasma membrane


  •  
    .

     Correct answer is : C


  •   Question 89

    Darwin?s finches are a good example of

    A : Connecting link
    B : Adaptive radiation
    C : Convergent evolution
    D : Industrialmelanism


  •  
    .

     Correct answer is : B


  •   Question 90

    Which one of the following statements about all the four of Spongilla, Leech, Dolphin and Penguin is currect

    A : Leech is a fresh water form while all others are marine
    B : Spongilla has special collared cells called choano cytes, not found in the remaining three
    C : All are bilaterally symmetrical
    D : Penguin is homoiothermic while the remaining three are poikilothermic


  •  
    .

     Correct answer is : B


  •   Question 91

    The figure given below is a diagrammatic representation of response of organisms to abiotic factors.What do a, b and c represent respectively



    A : regulator,partial regulator,Conformer
    B : parital regulator,regulator,Conformer
    C : regulator,conformer,partial regulator
    D : conformer,regulator,partial regulator


  •  
    .

     Correct answer is : C


  •   Question 92

    Algae have cell wall made up of

    A : Hemicellulose, pectins and proteins
    B : pectins, celluose and proteins
    C : Cellulose, hemicellulose and pectins
    D : Cellulose, galactans andmannans


  •  
    .

     Correct answer is : D


  •   Question 93

    An improved variety of transgenic basmati rice

    A : gives high yield and is rich in vitamin A
    B : is completely resistant to all insect pests and diseases of paddy
    C : gives high yield but has no characteristic aroma
    D : does not require chemical fertilizers and growth hormones


  •  
    .

     Correct answer is : A


  •   Question 94

    In vitro ferilisation is a technique that involves transfer of which one of the following into the fallopian tube

    A : Either zygote or early embryo upto 8 cell stage
    B : Embryo of 32 cell stage
    C : Zygote only
    D : Embryo only, upto 8 cell stage


  •  
    .

     Correct answer is : A


  •   Question 95

    Listed below are four respiratory capacities (a-d) and four jumbled respiratory volumes of a normal human adult
    Respiratory capacites Respiratory volumes
    (a)Residual volume 2500mL
    (b) Vital capacity 3500mL
    (c) Inspiratory reserve volume 1200mL
    (d) Inspiratory capacity 4500mL

    Which one of the following is the correct matching of two capacities and volumes


    A : (c) 1200mL, (d) 2500mL
    B : (d) 3500mL, (a) 1200mL
    C : (a) 4500mL, (b) 3500mL
    D : (b) 2500mL, (c) 4500mL


  •  
    .

     Correct answer is : B


  •   Question 96

    Membrane - bound organelles are absent in

    A : Streptococcus
    B : Chlamydomonas
    C : Plasmoldium
    D : Saccharomyces


  •  
    .

     Correct answer is : A


  •   Question 97

    The scutellum observed in a grain of wheat or maize is comparable to which part of the seed in other monocotyledons

    A : Endosperm
    B : Aleurone layer
    C : Plumule
    D : Cotyledon


  •  
    .

     Correct answer is : D


  •   Question 98

    Coiling of garden pea tendrils around any support is an example of

    A : Thigmonasty
    B : Thigmotropism
    C : Thermotaxis
    D : Thigmotaxis


  •  
    .

     Correct answer is : B


  •   Question 99

    Restriction endonucleases are enzymes which

    A : Recognize a specific nueleotide sequence for binding of DNA ligase
    B : Restrict the action of the enyme DNA polymerase
    C : Remove nucleotides from the ends of the DNA molecule
    D : Make cuts at specific positions within the DNA molecule


  •  
    .

     Correct answer is : D


  •   Question 100

    If for some reason our goblet cells are non-functional, this will adversely affect

    A : secretion of sebum from the sebaceous glands
    B : maturation of sperms
    C : smooth movement of food down the intestine
    D : production of somatostatin


  •  
    .

     Correct answer is : D


  •   Question 101

    Transfer of pollen grains from the anther to the stigma of another flower of the same plant is called

    A : Geitonogamy
    B : Karyogamy
    C : Autogamy
    D : Xenogamy


  •  
    .

     Correct answer is : A


  •   Question 102

    One of the free-living anaerobic nitrogen-fixer is

    A : Rhodospirillum
    B : Rhizobium
    C : Azotobacter
    D : Beijernickia


  •  
    .

     Correct answer is : C


  •   Question 103

    Photoperiodism was first characterised in

    A : Potato
    B : Tomato
    C : Cotton
    D : Tobacco


  •  
    .

     Correct answer is : D


  •   Question 104

    Vasa efferentia are the ductules leading from

    A : Rete testis to vas deferens
    B : Vas deferens to epididymis
    C : Epididymis to urethra
    D : Testicular lobules to rete testis


  •  
    .

     Correct answer is : A


  •   Question 105

    Which one of the following has its own DNA

    A : Dictyosome
    B : Lysosome
    C : Peroxisome
    D : Mitochondria


  •  
    .

     Correct answer is : D


  •   Question 106

    Select the correct statement from the ones given below

    A : Morphine is often given to persons who have undergone surgery as a pain killer
    B : Chewing tobacco lowers blood pressure and heart rate
    C : Cocaine is given to patients after surgery as it stimulates recovery
    D : Barbiturates when given to criminals make them tell the truth


  •  
    .

     Correct answer is : A


  •   Question 107

    What is true about RBCs in humans

    A : They transport 99.5 per cent of O2
    B : They transport about 80 per cent oxygen only and the rest 20 per cent of it is transported in dissolved state in blood plasma
    C : They do not carry CO2 at all
    D : They carry about 20-25 per cent of CO2


  •  
    .

     Correct answer is : D


  •   Question 108

    Which one of the following statements about human sperm is correct.

    A : The sperm lysins in the acrosome dissolve the egg envelope facilitating fertilisation
    B : Acrosome serves as a sensory structure leading the sperm towards the ovum
    C : Acrosome seves no particular function
    D : Acrosome has a conical pointed structure used for piercing and penetrating the egg resulting in fertilisation.


  •  
    .

     Correct answer is : A


  •   Question 109

    The signals for parturition originate from

    A : Placenta as well as fully developed foetus
    B : Oxytocin released from maternal pituitary
    C : Fully developed foetus only
    D : Placenta only


  •  
    .

     Correct answer is : B


  •   Question 110

    The common nitrogen- fixer in paddy fields is

    A : Azospirillum
    B : Oscillatoria
    C : Frankia
    D : Rhizobium


  •  
    .

     Correct answer is : A


  •   Question 111

    The common nitrogen- fixer in paddy fields is

    A : Azospirillum
    B : Oscillatoria
    C : Frankia
    D : Rhizobium


  •  
    .

     Correct answer is : A


  •   Question 112

    Wind pollinated flowers are

    A : Small, producing large number of dry pollen grains
    B : Large producing abunant nectar and pollen
    C : Small, producing nectar and dry pollen
    D : Small, brightly coloured, producing large number of pollen grains


  •  
    .

     Correct answer is : A


  •   Question 113

    Ovary is half-inferior in the flowers of

    A : Plum
    B : Brinjal
    C : Cucumber
    D : Guava


  •  
    .

     Correct answer is : D


  •   Question 114

    Genetic engineering has been successfully used for producing

    A : Transgenic models for studying new treatments for certain cardiac diseases
    B : Transgenic Cow-Rosie which produces high fatmilk for making ghee
    C : Animals like bulls for farm work as they have super power
    D : Transgenic mice for testing safety of polio vaccine before use is humans


  •  
    .

     Correct answer is : B


  •   Question 115

    Which one of the following is one of the characteristics of a biological community

    A : Natality
    B : Mortality
    C : Sex-ratio
    D : Stratification


  •  
    .

     Correct answer is : C


  •   Question 116

    The genotype of a plant showing the dominant Pheotype can be determined by

    A : Dihybrid cross
    B : Pedigree analysis
    C : Back cross
    D : Test cross


  •  
    .

     Correct answer is : D


  •   Question 117

    DNA or RNA segment tagged with a radioactivemolecule is called

    A : Probe
    B : Clone
    C : Plasmid
    D : Vector


  •  
    .

     Correct answer is : A


  •   Question 118

    Which one of following statements is correct with respect of AIDS

    A : Drug addicts are least suceptible to HIV infection
    B : AIDS patinets are being fully cured cent per cent with proper care and nutrition
    C : The causative HIV retrovirus enters helper T-lymphocyte thus reducing their numbers
    D : The HIV can be transmitted through eating food together with an infected person


  •  
    .

     Correct answer is : C


  •   Question 119

    Heartwood differs from sapwood in

    A : Absence of vessels and parenchyma
    B : Having dead and non-conducing elements
    C : Being susceptible to pests and pathogens
    D : Presence of rays and fibres


  •  
    .

     Correct answer is : B


  •   Question 120

    A renewable exhaustible natural resource is

    A : Petroleum
    B : Minerals
    C : Forest
    D : Coal


  •  
    .

     Correct answer is : C


  •   Question 121

    What was the most significant trend in the evolution of modern man (Homo sapiens) from his ancestors

    A : Increasing cranial capacity
    B : Uprigth posture
    C : Shortening of jaws
    D : Binocular vision


  •  
    .

     Correct answer is : A


  •   Question 122

    If one strand of DNA has the nitrogenous base sequence as ATCTG, what would be the complementary RNA stand sequence

    A : AACTG
    B : ATCGU
    C : TTAGU
    D : UAGAC


  •  
    .

     Correct answer is : D


  •   Question 123

    Which one of the following options gives one correct example each of convergent evolution and divergent evolution.

    A :
    B :
    C :
    D :
    Convergent evolution Divergent evolution
    Bones of forelimbs of vertebrates Wings of butterfly and birds
    Thorns of Bougainvillia and tendrils of cucurbita Eyes of Octopus and mammals
    Eyes of octopus and mammals Bones of forelimpbs of vertebrates
    Thorns of Bougainvillia and ten drils of cucurbita Wings of butterflies and birds



  •  
    .

     Correct answer is : C


  •   Question 124

    A normal - visioned man whose father was colour bilind, marries a woman whose father was also colour - blind. They have their first child as a daughter. What are the chances that this child would be colour blind

    A : 25%
    B : 50%
    C : 100%
    D : 0%


  •  
    .

     Correct answer is : D


  •   Question 125

    Select the correct statement regarding the specific disorder of muscular or skeletal system

    A : Myasthenia gravis - Auto immune disorder which inhibits sliding of myosin filaments
    B : Gout- inflammation of joints due to extra deposition of calcium
    C : Muscular dystrophy - age related shorting of muscles
    D : Osteoporosis - decrease in bone mass and higher chances of fractures with advancing age


  •  
    .

     Correct answer is : D


  •   Question 126

    A certain road accident patient with unknown blood group needs immediate blood transfusion. His one doctor friend at once offers his blood. What was the blood group of the donor

    A : Blood group O
    B : Blood group A
    C : Blood group B
    D : Blood group AB


  •  
    .

     Correct answer is : A


  •   Question 127

    The maximum amount of electrolytes and water (70 - 80 percent) from the glomerular filtrate is reabsorbed in which part of the nephron

    A : Proximal convoluted tubule
    B : Descending limb of loop of Henle
    C : Ascending limb of loop of Henle
    D : Distal convoluted tubule


  •  
    .

     Correct answer is : A


  •   Question 128

    The human hind brain comprises three parts, one of which is

    A : Cerebellum
    B : Hypothalamus
    C : Spinal
    D : Corpus callosum


  •  
    .

     Correct answer is : A


  •   Question 129

    Which one of the following pairs of hormones are the examples of those that can easily pass through the cell membrane of the target cell and bind to a receptor inside is (mostly in the nucleus)

    A : Somatostatin, oxytocin
    B : Cortisol, testosterone
    C : Insulin, glucagon
    D : Thyroxin, Insulin


  •  
    .

     Correct answer is : B


  •   Question 130

    The lydig cell as found in the human body are the secretory source of

    A : Glucagon
    B : Androgens
    C : Progesterone
    D : Intestinal mucus


  •  
    .

     Correct answer is : B


  •   Question 131

    Select the correct statement from the ones given below with respect to Periplaneta americana

    A : There are 16 very long Malpighian tubules present at the junctions of midgut and hindgut
    B : Grinding of food is carried out only by the mouth parts
    C : Nervous system located dorsally, consists of segmentally arranged ganglia joined by a pair of longitudinal connective
    D : Males bear a pair of short thread like anal styles


  •  
    .

     Correct answer is : D


  •   Question 132

    Anxiety and eating spicy food together in a otherwise normal human, may lead to

    A : Diarrhoea
    B : Vomiting
    C : Indigestion
    D : Jaundice


  •  
    .

     Correct answer is : C


  •   Question 133

    Which one of the following is the correct statement for respiration in humans ?

    A : Workers in grinding and stone-breaking industries may suffer, from lung fibrosis
    B : About 90% of carbon dioxide (CO2) is carried by haemoglobin as carbamino haemoglobin
    C : Cigarette smoking may lead to inflammation of bronchi
    D : Neural signals from pneumotoxic centre in pons region of brain can increase the duration of inspiration


  •  
    .

     Correct answer is : A


  •   Question 134

    What is correct to say about the hormone action in humans ?

    A : In females, FSH first binds with specific receptors on ovarian cell membrane
    B : FSH stimulates the secretion of estrogen and progesterone
    C : Glucagon is secreted by β- cells of islets of langerhans and stimulates glycogenolysis
    D : Secretion of thymosins is stimulated with aging


  •  
    .

     Correct answer is : A


  •   Question 135

    Pheretima and its close relatives derive nourishment from :

    A : Soil insects
    B : Small pieces of fresh fallen leaves of maize, etc
    C : Sugarcane roots
    D : Decaying fallen leaves and soil organic matter


  •  
    .

     Correct answer is : D


  •   Question 136

    Compared to those of humans, the erythrocytes in frog are :

    A : Very much smaller and fewer
    B : Nucleated and without haemoglobin
    C : Without nucleous but with haemoglobin
    D : Nucleated and with haemoglobin


  •  
    .

     Correct answer is : D


  •   Question 137

    Which one is the most abundant protein in the animal world ?

    A : Collagen
    B : Insulin
    C : Trypsin
    D : Haemoglobin


  •  
    .

     Correct answer is : A


  •   Question 138

    Which part of the human ear plays no role in hearing as such but is otherwise very much required ?

    A : Vestibular apparatus
    B : Ear ossicles
    C : Eustachian tube
    D : Organ of corti


  •  
    .

     Correct answer is : A


  •   Question 139

    A person entering an empty room suddenly finds a snake right in front on opening the door. Which one of the following is likely to happen in his neuro-hormonal control system ?

    A : Hypothalamus activates the parasympathetic division of brain
    B : Sympathetic nervous system is activated releasing epinephrin and norepinephrin from adrenal cortex
    C : Sympathetic nervous system is activated releasing epinephrin and norepinephrin from adrenal medulla
    D : Neurotransmitters diffuse rapidly across the cleft and transmit a nerve impulse


  •  
    .

     Correct answer is : C


  •   Question 140

    In a normal pregnant woman, the amount of total gonadotropin activity was assessed. The results expected was :

    A : High levels of FSH and LH in uterus to stimulate endometrial thickening
    B : High level of circulating HCG to stimulate estrogen and progesterone synthesis
    C : High level of circulating FSH and LH in the uterus to stimulate implantation of the embryo
    D : High level of circulating HCG to stimulate endometrial thickening


  •  
    .

     Correct answer is : B


  •   Question 141

    The test-tube baby programme employs which one of the following techniques ?

    A : Gamete intra fallopian transfer (GIFT)
    B : Zygote intra fallopian transfer (ZIFT)
    C : Intra cytoplasmic sperm injection (ICSI)
    D : Intra uterine insemination (IUI)


  •  
    .

     Correct answer is : B


  •   Question 142

    Signals for parturition originate from :

    A : Placenta only
    B : Fully developed foetus only
    C : Both placenta as well as fully developed foetus
    D : Oxytocin released from maternal pituitary


  •  
    .

     Correct answer is : C


  •   Question 143

    Which one of the following statements is false in respect of viability of mammalian sperm ?

    A : Viability of sperm is determined by its motility
    B : Sperms must be concentrated in a thick suspension
    C : Sperm is viable for only up to 24 hours
    D : Survival of sperm depends on the pH of the medium and is more active in alkaline medium


  •  
    .

     Correct answer is : C


  •   Question 144

    The extinct human who lived 1,00,000 to 40,000 years ago, in Europe, Asia and parts of Africa, with short stature, heavy eye brows, retreating fore heads, large jaws with heavy teeth, stocky bodies, a lumbering gait and stooped posture was

    A : Cro-magnan humans
    B : Ramapithecus
    C : Homo habilis
    D : Neanderthal human


  •  
    .

     Correct answer is : D


  •   Question 145

    What is the figure given below showing in particular ?



    A : Tubectomy
    B : Vasectomy
    C : Ovarian cancer
    D : Uterine cancer


  •  
    .

     Correct answer is : A


  •   Question 146

    In an area where DDT had been used extensively, the population of birds declined significantly because :

    A : Cobras were feeding exclusively on birds
    B : Many of the birds eggs laid, did not hatch
    C : Birds stopped laying eggs
    D : Earthworms in the area got eradicated


  •  
    .

     Correct answer is : B


  •   Question 147

    Giiven below is an imaginary pyramid of numbers. What could be one of the possibilities about certain organisms at some of the different levels ?



    A : Level one PP is "pipal trees" and the level SC is "sheep"
    B : Level PC is "rats" and level SC is "cats"
    C : Level PC is "insects" and level SC is "small insectivorous birds"
    D : Level PP is "phytoplanktons" in sea and "Whale" on top level TC


  •  
    .

     Correct answer is : C


  •   Question 148

    Common cold differs from pneumonia in, that

    A : Pneumonia is caused by a virus while the common cold is caused by the bacterium haemophilus influenzae
    B : Pneumonia pathogen infects alveoli wheras the common cold affects nose and respiratory passage but not the lungs
    C : Pneumonia is a communicable disease whereas the common cold is a nutritional deficiency disease
    D : Pneumonia can be prevented by a live attenuated bacterial vaccine whereas the common cold has no effective vaccine


  •  
    .

     Correct answer is : B


  •   Question 149

    Identify the possible link "A" in the following food chain Plant → insect → frog → "A" → Eagle

    A : Cobra
    B : Parrot
    C : Rabbit
    D : Wolf


  •  
    .

     Correct answer is : A


  •   Question 150

    Which one of the following is an example of carrying out biological control of pests/diseases using microbes ?

    A : Bt-cotton to increase cotton yield
    B : Lady bird beetle against aphids in mustard
    C : Trichoderms sp. against certain plant pathogens
    D : Nucleopoly hedrovirus against white rust in Brassica


  •  
    .

     Correct answer is : C


  •   Question 151

    Widal Test is carried out to test :

    A : HIV/AIDS
    B : Typhoid fever
    C : Malaria
    D : Diabetes mellitus


  •  
    .

     Correct answer is : B


  •   Question 152

    Cirrhosis of liver is caused by the chronic intake of

    A : Tobacco (Chewing)
    B : Cocaine
    C : Opium
    D : Alcohol


  •  
    .

     Correct answer is : D


  •   Question 153

    Which one of the following in not a property of cancerous cells whereas the remaining three are ?

    A : They divide in an uncontrolled manner
    B : They show contact inhibition
    C : They compete with normal cells for vital nutrients
    D : They do not remain confined in the area of formation


  •  
    .

     Correct answer is : B


  •   Question 154

    Motile zygote of Plasmodium occurs in

    A : Human RBCs
    B : Human liver
    C : Gut of female Anopheles
    D : Salivary glands of Anopheles


  •  
    .

     Correct answer is : C


  •   Question 155

    In which one of the following options the two examples are correctly matched with their particular type of immunity ?

    A : Saliva in mouth and tears in eyes-Physical barriers
    B : Mucus coating of epithelium lining the urinogenitial tract and the HCl in stomach- Physiological barriers
    C : Polymorphonuclear leukocytes and monocytes-Cellular barriers
    D : Anti-tetanus and anti-snake bite injections -Active immunity


  •  
    .

     Correct answer is : C


  •   Question 156

    The figure below is the diagrammatic respesentation o the E.Coli vector pBR 322. Which one of the given options correctly identifies its certain component(s) ?



    A : Hind III, EcoRI-selectable markers
    B : ampR, tetR-antibiotic resistance genes
    C : ori- original restriction enzyme
    D : rop-reduced osmotic pressure


  •  
    .

     Correct answer is : B


  •   Question 157

    Measuring biochemical oxygen demand (BOD) is a method used for

    A : Measuring the activity of Saccharomyces cerevisae in producing curd on a commercial scale
    B : Working out the efficiency of R.B.Cs. about their capacity to carry oxygen
    C : Estimating the amount of organic matter in sewage water
    D : Working out the efficiency of oil driven automobile engines


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     Correct answer is : C


  •   Question 158

    The most abundant prokaryotes helpful to humans in making curd from milk and in production of antibiotics are the ones categorised as :

    A : Chemosynthetic autotrophs
    B : Heterotrophic bacteria
    C : Cyanobacteria
    D : Archaebactera


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     Correct answer is : B


  •   Question 159

    People who have migrated from the planes to an area adjoining Rohtang Pass about six months back :

    A : Suffer from altitude sickness with symptons like nausea, fatigue, etc
    B : Have the usual RBC count but their haemoglobin has very high binding affinity to O2.
    C : Have more RBCs and their haemoglobin has a lower binding affinity to O2
    D : Are not physically fit to play games like football


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     Correct answer is : C


  •   Question 160

    Monascus purpureus is a yeast used commercially in the production of :

    A : Citric acid
    B : Blood cholesterol lowering statins
    C : Ethanol
    D : Streptokinase for removing clots from the blood vessels


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     Correct answer is : B


  • MY REPORT
    TOTAL = 160
    ANSWERED =
    CORRECT / TOTAL = /160
    POSITIVE SCORE =
    NEGATIVE SCORE =
    FINAL SCORE =