Science & Technology PYQs

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1. 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
2. Prelims 2000Q128Biotechnology

   Assertion (A): “DNA Finger-printing” has become a powerful tool to establish paternity and identity of criminals in rape and assault cases.

   Reason (R): Trace evidences such as hairs, saliva and dried semen are adequate for DNA analysis.

   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
3. Prelims 1999Q104Biology & Human Body

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

   aIrisbLenscCorneadRetina
4. Prelims 1999Q105Physics

   Consider the following statement: An ordinary light bulb has a rather short life because the

   I.Filament wire is not uniform.

   II.Bulb cannot be evacuated completely.

   III.Wires supporting the filament melt at high temperatures.

   Which of the above statements are correct?

   aI and IIIbII and IIIcI and IIdI, II and III
5. 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
6. Prelims 1999Q108Health & Diseases

   Match List I (Drugs / Chemicals) with List II (Their uses) and select the correct answer using the codes given below the Lists:

   List I

   I.Atropine

   II.Ether

   III.Nitro-glycerine

   IV.Pyrethrin

   List II

   A) Local anaesthesia

   B) Heart trouble

   C) Dilation of pupil

   D) Mosquito control

   Codes:

   aI-A, II-C, III-B, IV-DbI-A, II-C, III-D, IV-BcI-C, II-A, III-D, IV-BdI-C, II-A, III-B, IV-D
7. Prelims 1999Q109Chemistry

   Match List I (Naturally occurring substances) with List II (Elements) and select the correct answer using the codes given below the Lists:

   List I

   I.Diamond

   II.Marble

   III.Sand

   IV.Ruby

   List II

   A) Calcium

   B) Silicon

   C) Aluminium

   D) Carbon

   Codes:

   aI-C, II-A, III-B, IV-DbI-D, II-B, III-A, IV-CcI-B, II-A, III-C, IV-DdI-D, II-A, III-B, IV-C
8. Prelims 1999Q111Biotechnology

   Indian farmers are unhappy over the introduction of “Terminator Seed Technology” because the seeds produced by this technology are expected to

   ashow poor germinationbform low yielding plants despite the high qualitycgive rise to sexually sterile plantsdgive rise to plants incapable of forming viable seeds
9. Prelims 1999Q112Physics

   Consider the following statements regarding a motor car battery:

   I.The voltage is usually 12 V.

   II.Electrolyte used is hydrochloric acid.

   III.Electrodes are lead and copper.

   IV.Capacity is expressed in ampere-hour.

   Which of the above statements are correct?

   aI and IIbII and IIIcIII and IVdI and IV
10. Prelims 1999Q113Physics

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

    List I

    I.High speed

    II.Wavelength

    III.Pressure

    IV.Energy

    List II

    A) Mach

    B) Angstrom

    C) Pascal

    D) Joule

    Codes:

    aI-B, II-A, III-C, IV-DbI-A, II-B, III-D, IV-CcI-A, II-B, III-C, IV-DdI-B, II-A, III-D, IV-C
11. Prelims 1999Q114Biology & Human Body

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

    aRoyal haemophiliabTay Sachs diseasecCystic fibrosisdHypertension
12. Prelims 1999Q115Physics

    For which one of the following is capillarity not the only reason?

    aBlotting of inkbRising of underground watercSpread of water drop on a cotton clothdRising of water from the roots of a plant to its foliage
13. Prelims 1999Q116Physics

    Consider the following statements:

    I.If a person looks at a coin which is in a bucket of water, the coin will appear to be closer than it really is.

    II.If a person under water looks at a coin above the water surface, the coin will appear to be at a higher level than it really is.

    Which of the above statements is/are correct?

    aI and IIbI alonecII alonedNeither I nor II
14. Prelims 1999Q117Health & Diseases

    Lathyrism is caused by excessive consumption of

    aKesari dalbMustard oilcPolished ricedMushrooms
15. Prelims 1999Q118Physics

    Barium in a suitable form is administered to patients before an X-ray examination of the stomach, because

    abarium allows X-rays to pass through the stomach on account of its transparency to X-raysbbarium compound, like magnesium sulphate helps in cleaning the stomach before X-ray examinationcbarium is a good absorber of X-rays and this helps the stomach to appear clearly in contrast with the other regions in the picturedbarium salts are white in colour and this helps the stomach to appear clearly in contrast with other regions in the picture
16. Prelims 1999Q119Physics

    Endoscopy, a technique used to explore the stomach or other inner parts of the body is based on the phenomenon of

    atotal internal reflectionbinterferencecdiffractiondpolarisation
17. Prelims 1999Q122Chemistry

    When ants bite, they inject

    aglacial acetic acidbmethanolcformic aciddstearic acid
18. Prelims 1999Q123Biology & Human Body

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

    aBiofertilizerbCoralloid rootcLichendMycorrhiza
19. Prelims 1999Q124Chemistry

    Which one of the following types of coal contains a higher percentage of carbon than the rest?

    aBituminous coalbLignitecPeatdAnthracite
20. Prelims 1999Q125Physics

    Cobalt-60 is commonly used in radiation therapy because it emits

    aalpha raysbbeta rayscgamma raysdX-rays