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Exam Year: 2000

  • A rectangular water tank measures 15 m x 6 m at top and is 10 m deep. It is full of water. If water is drawn out lowering the level by 1 metre, how much of water has been drawn out ?

    (a)

    45,000 litres

    (b)

    90,000 litres

    (c)

    4,500 litres

    (d)

    900 litres

    Correct Answer:

  • An accurate clock shows 8 O’clock in the morning. Through how many degrees will the hour hand rotate when the clock shows 2 O’clock in the afternoon ?

    (a)

    150°

    (b)

    144°

    (c)

    168°

    (d)

    180°

    Correct Answer:

  • 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.

    (a)

    Both A and R are true, and R is the correct explanation of A

    (b)

    Both A and R are true, but R is not a correct explanation of A

    (c)

    A is true, but R is false

    (d)

    A is false, but R is true

    Correct Answer:

    (a)

  • 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.

    (a)

    Both A and R are true, and R is the correct explanation of A

    (b)

    Both A and R are true, but R is not a correct explanation of A

    (c)

    A is true, but R is false

    (d)

    A is false, but R is true

    Correct Answer:

    (d)

  • Within biological communities, some species are important in determining the ability of a large number of other species to persist in the community. Such species are called

    (a)

    Keystone species

    (b)

    Allopatric species

    (c)

    Sympatric species

    (d)

    Threatened species

    Correct Answer:

  • Consider the following statements : Hard water is not suitable for I. drinking. II. washing cloths with soap. III. use in boilers. IV. irrigating crops. Which of these statements are correct ?

    (a)

    I and III

    (b)

    II and III

    (c)

    I, II and IV

    (d)

    I, II, III and IV

    Correct Answer:

  • Canola refers to special type of oil seed mustard varieties bred for human consumption. The main characteristic of these varieties is that the

    (a)

    seeds have very high oil content

    (b)

    oil is rich in unsaturated fatty acids

    (c)

    oil has long shelf-life

    (d)

    oil has very low Erucic acid content

    Correct Answer:

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

    (a)

    a decrease in the supply of oxygen

    (b)

    minor wear and tear of muscle fibres

    (c)

    the depletion of glucose

    (d)

    the accumulation of lactic acid

    Correct Answer:

    (d)

  • Insect-resistant cotton plants have been genetically engineered by inserting a gene from a/an

    (a)

    virus

    (b)

    bacterium

    (c)

    insect

    (d)

    plant

    Correct Answer:

    (b)

  • Hybridoma technology is a new biotechnological approach for commercial production of

    (a)

    monoclonal antibodies

    (b)

    interferon

    (c)

    antibodies

    (d)

    alcohol

    Correct Answer:

    (a)