Biology & Human Body PYQs

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1. Prelims 2002Q26Biology & Human Body

   With reference to the blood in a normal person, which one of the following statements is correct?

   aCompared to arteries, veins are less numerous and hold less of the body’s blood at any given timebBlood cells constitute about 70 % of the total volume of the bloodcWhite Blood Cells (WBC) are made by lymph nodes onlydThe blood has more platelets than WBC
2. Prelims 2002Q32Biology & Human Body

   Consider the following plants:

   1.Bougainvillea

   2.Carnations

   3.Cocoa

   4.Grapes

   Which of these plants are propagated by stem cuttings?

   a1 and 2b2, 3 and 4c1, 3 and 4d1, 2, 3 and 4
3. Prelims 2002Q43Biology & Human BodyAnswer disputed

   In the context of the organic evolution, the loss of limbs of snakes is explained by the phenomenon of

   ause and disuse of organsbadaptation to living in burrowscnatural selectiondinheritance of acquired characters
4. Prelims 2002Q55Biology & Human Body

   When one gene controls two or more different characters simultaneously, the phenomenon is called

   aApomixisbPleiotropycPolyploidydPolyteny
5. Prelims 2002Q65Biology & Human Body

   With reference to the human body, consider the following statements:

   1.The production of somatotropin goes up when a person exercises.

   2.Men's testes produce progesterone.

   3.Women's adrenal glands secrete testosterone.

   4.Stress causes the adrenals to release very less amount of cortisol than usual.

   Which of these statements are correct?

   a1, 2 and 3b1, 3 and 4c2, 3 and 4d1, 2 and 4
6. Prelims 2002Q100Biology & Human Body

   In a bisexual flower, if androecium and gynaecium mature at different times, the phenomenon is known as

   aDichogamybHerkogamycHeterogamydMonogamy
7. Prelims 2002Q127Biology & Human Body

   Which one of the following statements is not correct?

   aAll echinoderms are viviparousbRound worm has no circulatory systemcIn bony fishes, swim bladder is usually presentdIn cartilaginous fishes, fertilisation is internal
8. Prelims 2002Q134Biology & Human Body

   Which one of the following statements is correct?

   aPrions are the smallest free-living cellsbThe cell wall of Mycoplasmas is made up of amino sugarscViroids consist of a single-stranded RNA moleculedRickettsia’s lack cell wall
9. Prelims 2002Q141Biology & Human Body

   Assertion (A): Drinking of whisky increases the frequency of urination.

   Reason (R): Alcohol intake speeds up the secretion of vasopressin in the body.

   aBoth A and R are individually true and R is the correct explanation of AbBoth A and R are individually true but R is not a correct explanation of AcA is true but R is falsedA is false but R is true
10. Prelims 2001Q123Biology & Human Body

    Which of the following cell organelles play the most significant role in protein synthesis?

    aLysosome and CentrosomebEndoplasmic reticulum and RibosomecGolgi apparatus and MitochondriadLysosome and Mitochondria
11. Prelims 2001Q125Biology & Human Body

    The cellular and molecular control of programmed cell death is known as

    aApoptosisbAgeingcDegenerationdNecrosis
12. Prelims 2001Q126Biology & Human Body

    Which organelle in the cell, other than nucleus, contains DNA?

    aCentriolebGolgi apparatuscLysosomedMitochondrion
13. Prelims 2001Q128Biology & Human Body

    Antigen is a substance which

    adestroys harmful bacteriabis used to treat poisoningclowers body temperaturedstimulates formation of antibody
14. Prelims 2001Q129Biology & Human Body

    Which of the following features of DNA makes it uniquely suited to store and transmit genetic information from generation to generation?

    aComplementarity of the two strandsbDouble helixcNumber of base pairs per turndSugar phosphate backbone
15. Prelims 2001Q131Biology & Human Body

    Match List I with List II and select the correct answer using the codes given below the Lists:

    List I (Bone)

    A.Breast-bone

    B.Collar-bone

    C.Knee-cap

    D.Shoulder blade

    List II (Name)

    1.Clavicle

    2.Patella

    3.Scapula

    4.Sternum

    aA-4, B-1, C-3, D-2bA-1, B-4, C-3, D-2cA-1, B-4, C-2, D-3dA-4, B-1, C-2, D-3
16. Prelims 2001Q132Biology & Human Body

    Consider the following statements:

    I.Tapeworm is a hermaphrodite.

    II.Round-worm has separate sexes.

    III.Filaria is caused by a nematode.

    IV.Guinea worm is an annelid.

    Which of these are correct?

    aI and IIbI, II and IIIcIII and IVdII, III and IV
17. Prelims 2001Q135Biology & Human Body

    In the eye donation, which part of the eye is transplanted from the donor?

    aCorneabLenscRetinadThe whole eye
18. Prelims 2001Q136Biology & Human Body

    A man whose blood group is not known meets with a serious accident and needs blood transfusion immediately. Which one of the blood groups mentioned below and readily available in the hospital will be safe for transfusion?

    aO, Rh-bO, Rh+cAB, Rh-dAB, Rh+
19. Prelims 2001Q138Biology & Human Body

    Match List I with List II and select the correct answer using the codes given below the Lists:

    List I (Substance)

    A.Ptyalin

    B.Pepsin

    C.Renin

    D.Oxytocin

    List II (Physiological role)

    1.Converts angiotensinogen in blood into angiotensin

    2.Digests starch

    3.Digests proteins

    4.Hydrolyses fats

    5.Induces contraction of smooth muscles

    aA-2, B-3, C-1, D-5bA-3, B-4, C-2, D-5cA-2, B-3, C-5, D-1dA-3, B-1, C-2, D-4
20. Prelims 2000Q116Biology & Human Body

    At which stage in its life-cycle does the silkworm yield the fibre of commerce?

    aEggbLarvacPupadImago
21. Prelims 2000Q119Biology & Human Body

    Phytotron is a facility to

    agrow plants under disease-free conditionsbconserve endangered species of plantscgrow plants under controlled conditionsdinduce mutations
22. Prelims 2000Q120Biology & Human Body

    Match List I (Endocrine glands) with List II (Hormones secreted) and select the correct answer using the codes given below the Lists:

    List I

    I.Gonads

    II.Pituitary

    III.Pancreas

    IV.Adrenal

    List II

    A) Insulin

    B) Progesterone

    C) Growth hormones

    D) Cortisone

    Codes:

    aI-C, II-B, III-D, IV-AbI-B, II-C, III-D, IV-AcI-B, II-C, III-A, IV-DdI-C, II-B, III-A, IV-D
23. Prelims 2000Q123Biology & Human Body

    The sensation of fatigue in the muscles after prolonged strenuous physical work is caused by

    aa decrease in the supply of oxygenbminor wear and tear of muscle fibrescthe depletion of glucosedthe accumulation of lactic acid
24. Prelims 2000Q127Biology & Human Body

    Assertion (A): In human beings, the females play a major role in determining the sex of the offspring.

    Reason (R): Women have two ‘X’ chromosomes.

    aBoth A and R are true, and R is the correct explanation of AbBoth A and R are true, but R is not a correct explanation of AcA is true, but R is falsedA is false, but R is true
25. Prelims 1999Q104Biology & Human Body

    In eye donation, which one of the following parts of donor’s eye is utilised?

    aIrisbLenscCorneadRetina
26. Prelims 1999Q106Biology & Human Body

    Match the hormones in List I with items in List II and select the correct answer using the codes given below the Lists:

    List I

    I.Adrenaline

    II.Estrogen

    III.Insulin

    IV.Pheromones

    List II

    A) Anger, fear, danger

    B) Attracting partners through sense of smell

    C) Females

    D) Glucose

    Codes:

    aI-C, II-A, III-D, IV-BbI-A, II-C, III-B, IV-DcI-A, II-C, III-D, IV-BdI-C, II-A, III-B, IV-D
27. Prelims 1999Q114Biology & Human Body

    Which one of the following genetic diseases is sex-linked?

    aRoyal haemophiliabTay Sachs diseasecCystic fibrosisdHypertension
28. Prelims 1999Q123Biology & Human Body

    Which one of the following is a useful functional association between fungi and the roots of higher plants?

    aBiofertilizerbCoralloid rootcLichendMycorrhiza
29. Prelims 1998Q118Biology & Human Body

    Match List I with List II and select the correct answer using the codes given below the lists:

    List I

    A.Fruit

    B.Seed

    C.Wood

    D.Starch

    List II

    1.Ovule

    2.Leaf

    3.Stem

    4.Ovary

    aA-2, B-1, C-5, D-4bA-4, B-1, C-3, D-2cA-2, B-3, C-1, D-4dA-4, B-3, C-1, D-2
30. Prelims 1998Q123Biology & Human Body

    The complete conversion of glucose in the presence of oxygen into carbon dioxide and water with release of energy is called

    aaerobic respirationbanaerobic respirationcglycolysisdhydrolysis