Biology MCQs

11. Which of the following causes Dysentery and Influenza?
[A] Bacteria
[B] Viruses
[C] Bacteria and Viruses respectively
[D] Viruses and Bacteria respectively

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12. 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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13. Fat present below the skin surface in our body, acts as a barrier against which of the following losses? (UPSC Prelims 1996)
[A] Loss of heat from the body
[B] loss of essential body fluids
[C] loss of salts from the body
[D] entry of harmful micro-organisms from the environment

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14.
Who among the following is considered to be the father of Comparative Anatomy?
[A] Georges Cuvier
[B] Stephen Hales
[C] Hugo de Vries
[D] Edwin John Butler

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15. Which of the following minerals is related to cytochromes?
[A] Cu and Fe
[B] Cu
[C] Mg
[D] Fe

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16. Which of the following is the fastest enzyme?
[A] Pepsin
[B] Carbonic anhydrase
[C] DNA polymerase

[D] DNA gyrase

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17. Which of the following plant group requires both land and water to complete its life cycle?
[A] Tracheophyta
[B] Pteridophyta
[C] Thallophyta
[D] Bryophyta

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18. Most of the gymnosperms have__?
[A] Only antheridia
[B] Both antheridia and archegonia
[C] Archegonia but no antheridia
[D] Both absent

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19. Intercalary Meristem is found in which of the following?
[A] grass
[B] monocots
[C] pines
[D] All of the above

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20. Papaya foot rot is caused by which of the following?
[A] Phytophthora palmivora
[B] Albugo candida
[C] Peronospora parasitica
[D] Pythium aphanidermatum

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