Biology MCQs

11. Which of the following is the easiest way of finding out the nutritional status for large number of children in a short time? (UPSC Prelims 1982)
[A] Studying their behaviour
[B] Studying their hair, face and eyes
[C] Measuring their height and weight
[D] All of the above

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12. Which of the following plants is biennial? (UPSC Prelims 1989)
[A] Banana
[B] Pineapple
[C] Jack fruit
[D] Carrot

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13. Consider the following statements regarding bones in the human body:

  1. They consist of 80% solid matter and20% water.
  2. Solid matter in the bones is made mainly of cartilage.
  3. Impregnation of salts including carbonates and phosphates of lime imparts hardness to the bones.
  4. In old age, the proportion of lime decreases and bones become brittle and break easily.

Of these statements: (UPSC Prelims 1990)

[A] 1,2 and 3 are correct
[B] 2 and 4 are correct
[C] 2 and 3 are correct
[D] 1, 2, 3 and 4 are correct

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14. Consider the following statements:

  1. Tapeworm is a hermaphrodite.
  2. Round-worm has separate sexes.
  3. Filaria is caused by a nematode.
  4. Guinea-worm is an annelid.

Which of these are correct? (UPSC Prelims 2001)

[A] Only 1 and 2
[B] 1, 2 and 3
[C] 3 and 4
[D] 2, 3 and 4

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15. Which gas is released during the process of photosynthesis in plants?
[A] Carbon dioxide
[B] Methane
[C] Oxygen
[D] Nitrogen

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16. What does H denote in the popular term HIV ?
[A] Human
[B] Higher
[C] Hybrid
[D] NOTA

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17. Who gave the theory of Five King of Classification?
[A] RH Whittaker
[B] Ernest Haeckel

[C] Copeland
[D] Carolus Linnaeus

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18. Which of the following is true about the cell wall of Gram-positive bacteria?
[A] It consists of multiple layers
[B] It is thicker than that associated with gram-negative bacteria
[C] It contains teichoic acids
[D] All of these

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19. Which of the following structures is responsible for the motility of bacteria?
[A] pilli
[B] flagella
[C] sheath
[D] capsules

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20. Which of the following may be most likely to be missing from a gram-positive bacterium?
[A] Penicillin-binding protein
[B] Peptidoglycan
[C] Lipopolysaccharide
[D] Phospholipid bilayer membrane

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