UPSC NCRET SCIENCE AND TECHNOLOGY NOTES: TOPIC WISE SOLVED MCQ’s

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1. Which of the following given pairs is/are correctly matched?

Vitamins      Deficiency disease

  1. Vitamin C: Scurvy
  2. Vitamin D: Rickets
  3. Vitamin E: Night blindness
  4. a) 1 and 3 only  b) 3 only   c) 1 and 2 only  d) None

Ans: C

2. Which one among the following organisms, does not belong to the class of the other three?

a) Mite

b) Scorpion

c) Spider

d) Crab

Ans:  D

3. Which of the below-given diseases has/have been eradicated in India?

  1. Chickenpox
  2. Smallpox
  3. Diphtheria

a) 1  and 2 only     b) 2 only        c) 1,2 and 3    d) None

Ans:  B

4. Improper handling and storage of oil-seeds and cereal grains result in the production of aflatoxins which are not generally destroyed by the normal cooking process. Aflatoxins are produced by ____

a) Viruses

b) Bacteria

c) Protozoa

d) Moulds

Ans:  D

5. Consider the following diseases:

1. HIV-AIDS

2. Chikungunya

3. Hepatitis B

Which of the following diseases can be transmitted from one person to another through

tattooing?

a) 1 only     b) 2 and 3 only       c) 1 and 3 only        d) 1,2 and 3

Ans: C

6. Recombinant DNA technology / Genetic Engineering, allows genes to be transferred

1. From microorganisms to higher organisms

2. Across different species of plants

3. From animals to plants

Choose the correct answer using the codes given below:

a) 1 only     b) 2 and 3 only        c) 1 and 3 only       d) 1,2 and 3

Ans: D

7. Ball bearings are used in cars, bicycles, etc., because

a) The effective area of contact between the wheel and axle is reduced

b) The actual area of contact between the wheel and axle is increased

c) The effective area of contact between the wheel and axle is increased

d) None of the above statements is correct

Ans: D

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