Biology & Human Body PYQs

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1. Prelims 2025Q39Biology & Human Body

   Consider the following pairs :

   Plant : Description

   I.Cassava : Woody shrub

   II.Ginger : Herb with pseudostem

   III.Malabar spinach : Herbaceous climber

   IV.Mint : Annual shrub

   V.Papaya : Woody shrub

   How many of the above pairs are correctly matched?

   aOnly twobOnly threecOnly fourdAll the five
2. Prelims 2025Q49Biology & Human Body

   Consider the following statements :

   I.No virus can survive in ocean waters.

   II.No virus can infect bacteria.

   III.No virus can change the cellular transcriptional activity in host cells.

   How many of the statements given above are correct?

   aOnly onebOnly twocAll the threedNone
3. Prelims 2024Q19Biology & Human Body

   Consider the following plants :

   1.Groundnut

   2.Horse-gram

   3.Soybean

   How many of the above belong to the pea family ?

   aOnly onebOnly twocAll threedNone
4. Prelims 2024Q33Biology & Human Body

   Which one of the following is synthesised in human body that dilates blood vessels and increases blood flow ?

   aNitric oxidebNitrous oxidecNitrogen dioxidedNitrogen pentoxide
5. Prelims 2023Q18Biology & Human Body

   Consider the following statements :

   1.Some microorganisms can grow in environments with temperature above the boiling point of water.

   2.Some microorganisms can grow in environments with temperature below the freezing point of water.

   3.Some microorganisms can grow in highly acidic environment with a pH below 3.

   How many of the above statements are correct?

   aOnly onebOnly twocAll threedNone
6. Prelims 2022Q48Biology & Human Body

   Which of the following are nitrogen-fixing plants ?

   1.Alfalfa

   2.Amaranth

   3.Chickpea

   4.Clover

   5.Purslane (Kulfa)

   6.Spinach

   Select the correct answer using the code given below :

   a1, 3 and 4 onlyb1, 3, 5 and 6 onlyc2, 4, 5 and 6 onlyd1, 2, 4, 5 and 6
7. Prelims 2022Q97Biology & Human Body

   Which one of the following statements best describes the role of B cells and T cells in the human body ?

   aThey protect the body from environmental allergens.bThey alleviate the body’s pain and inflammation.cThey act as immunosuppressants in the body.dThey protect the body from the diseases caused by pathogens.
8. Prelims 2021Q69Biology & Human Body

   Consider the following :

   1.Bacteria

   2.Fungi

   3.Virus

   Which of the above can be cultured in artificial/synthetic medium?

   a1 and 2 onlyb2 and 3 onlyc1 and 3 onlyd1, 2 and 3
9. Prelims 2020Q47Biology & Human Body

   Which of the following statements are correct regarding the general difference between plant and animal cells ?

   1.Plant cells have cellulose cell walls whilst animal cells do not.

   2.Plant cells do not have plasma membrane unlike animal cells which do.

   3.Mature plant cell has one large vacuole whilst animal cell has many small vacuoles.

   Select the correct answer using the code given below :

   a1 and 2 onlyb2 and 3 onlyc1 and 3 onlyd1, 2 and 3
10. Prelims 2019Q92Biology & Human Body

    The word 'Denisovan' is sometimes mentioned in media in reference to

    afossils of a kind of dinosaursban early human speciesca cave system found in North-East Indiada geological period in the history of Indian subcontinent
11. Prelims 2018Q99Biology & Human Body

    Consider the following :

    1.Birds

    2.Dust blowing

    3.Rain

    4.Wind blowing

    Which of the above spread plant diseases ?

    a1 and 3 onlyb3 and 4 onlyc1, 2 and 4 onlyd1, 2, 3 and 4
12. Prelims 2016Q59Biology & Human Body

    Which of the following statements is/are correct?

    Viruses can infect

    1.bacteria

    2.fungi

    3.plants

    Select the correct answer using the code given below.

    a1 and 2 onlyb3 onlyc1 and 3 onlyd1, 2 and 3
13. Prelims 2014Q13Biology & Human Body

    Which of the following phenomena might have influenced the evolution of organisms?

    1.Continental drift

    2.Glacial cycles

    Select the correct answer using the code given below.

    a1 onlyb2 onlycBoth 1 and 2dNeither 1 nor 2
14. Prelims 2014Q17Biology & Human Body

    Consider the following :

    1.Bats

    2.Bears

    3.Rodents The phenomenon of hibernation can be observed in which of the above kinds of animals?

    a1 and 2 onlyb2 onlyc1, 2 and 3dHibernation cannot be observed in any of the above
15. Prelims 2014Q65Biology & Human Body

    Which one of the following is the process involved in photosynthesis?

    aPotential energy is released to form free energybFree energy is converted into potential energy and storedcFood is oxidized to release carbon dioxide and waterdOxygen is taken, and carbon dioxide and water vapour are given out
16. Prelims 2014Q67Biology & Human Body

    Which of the following statements is/are correct regarding vegetative propagation of plants?

    1.Vegetative propagation produces clonal population.

    2.Vegetative propagation helps in eliminating the virus.

    3.Vegetative propagation can be practiced most of the year.

    Select the correct answer using the code given below.

    a1 onlyb2 and 3 onlyc1 and 3 onlyd1, 2 and 3
17. Prelims 2014Q74Biology & Human Body

    Among the following organisms, which one does not belong to the class of other three?

    aCrabbMitecScorpiondSpider
18. Prelims 2013Q10Biology & Human Body

    Consider the following animals:

    1.Sea cow

    2.Sea horse

    3.Sea lion

    Which of the above is/are mammal/mammals?

    a1 onlyb1 and 3 onlyc2 and 3 onlyd1, 2 and 3
19. Prelims 2013Q50Biology & Human Body

    Consider the following minerals:

    1.Calcium

    2.Iron

    3.Sodium

    Which of the minerals given above is/are required by human body for the contraction of muscles?

    a1 onlyb2 and 3 onlyc1 and 3 onlyd1, 2 and 3
20. Prelims 2013Q86Biology & Human Body

    Fruits stored in a cold chamber exhibit longer storage life because

    aexposure to sunlight is preventedbconcentration of carbon dioxide in the environment is increasedcrate of respiration is decreaseddthere is an increase in humidity
21. Prelims 2013Q91Biology & Human Body

    Many transplanted seedlings do not grow because

    athe new soil does not contain favourable mineralsbmost of the root hairs grip the new soil too hardcmost of the root hairs are lost during transplantationdleaves get damaged during transplantation
22. Prelims 2013Q93Biology & Human Body

    Which of the following statements is/are correct?

    1.Viruses lack enzymes necessary for the generation of energy.

    2.Viruses can be cultured in any synthetic medium.

    3.Viruses are transmitted from one organism to another by biological vectors only.

    Select the correct answer using the codes given below.

    a1 onlyb2 and 3 onlyc1 and 3 onlyd1, 2 and 3
23. Prelims 2013Q94Biology & Human Body

    Which of the following leaf modifications occurs/occur in desert areas to inhibit water loss?

    1.Hard and waxy leaves

    2.Tiny leaves or no leaves

    3.Thorns instead of leaves

    Select the correct answer using the codes given below.

    a1 and 2 onlyb2 onlyc1 and 3 onlyd1, 2 and 3
24. Prelims 2012Q63Biology & Human Body

    Which one of the following sets of elements was primarily responsible for the origin of life on the Earth?

    aHydrogen, Oxygen, SodiumbCarbon, Hydrogen, NitrogencOxygen, Calcium, PhosphorusdCarbon, Hydrogen, Potassium
25. Prelims 2011Q18Biology & Human Body

    When the bark of a tree is removed in a circular fashion all around near its base, it gradually dries up and dies because

    aWater from soil cannot rise to aerial partsbRoots are starved of energycTree is infected by soil microbesdRoots do not receive oxygen for respiration
26. Prelims 2011Q66Biology & Human Body

    A married couple adopted a male child. A few years later twin boys were born to them. The blood group of the couple is AB positive and O negative. The blood group of the three sons is A positive, B positive, and O positive. The blood group of the adopted son is

    aO positivebA positivecB positivedCannot be determined on the basis of the given data
27. Prelims 2010Q65Biology & Human Body

    Some species of plants are insectivorous. Why ?

    aTheir growth in shady and dark places does not allow them to undertake sufficient photosynthesis and thus they depend on insects for nutrition.bThey are adapted to grow in nitrogen deficient soils and thus depend on insects for sufficient nitrogenous nutrition.cThey cannot synthesize certain vitamins themselves and depend on the insects digested by them.dThey have remained in that particular stage of evolution as living fossils, a link between autotrophs and heterotrophs.
28. Prelims 2010Q123Biology & Human Body

    Which one of the following processes in the bodies of living organisms is a digestive process ?

    aBreakdown of proteins into amino acidsbBreakdown of glucose into CO₂ and H₂OcConversion of glucose into glycogendConversion of amino acids into proteins
29. Prelims 2010Q124Biology & Human Body

    From the point of view of evolution of living organisms, which one of the following is the correct sequence of evolution ?

    aOtter – Tortoise – SharkbShark – Tortoise – OttercTortoise – Shark – OtterdShark – Otter – Tortoise
30. Prelims 2009Q67Biology & Human Body

    Consider the following statements:

    1.Sweet orange plant is propagated by grafting technique.

    2.Jasmine plant is propagated by layering technique.

    Which of the statements given above is/are correct?

    a1 onlyb2 onlycBoth 1 and 2dNeither 1 nor 2