Biology MCQs

11. Auxiliary bud develops into which of the following parts of the plant?
[A] Fruit
[B] Leaf
[C] Roots
[D] Branch

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12. Which of the following is the reason behind bleeding through nose in high mountain regions? (UPSC Prelims 1979).
[A] The pressure of the blood capillaries is higher than the outside pressure
[B] The pressure at high altitudes is greater than that in the plains
[C] The blood pressure increases at high altitudes
[D] The blood pressure decreases at high altitudes

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13. 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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14. In a bisexual flower, if androecium and gynaecium mature at different times, which of the following is the name given to the phenomenon? (UPSC Prelims 2002)
[A] Dichogamy
[B] Herkogamy
[C] Heterogamy
[D] Monogamy

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15. Which vitamin is also called as retinol?
[A] Vitamin A
[B] Vitamin C
[C] Vitamin D
[D] Vitamin K

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16. What is the famous Bombyx Mori, a variety of?
[A] Honeybee
[B] Cotton
[C] Earthworm
[D] Silk

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17. Which statement is true for the capsid?
[A] It consists of capsomeres
[B] This the outermost layer of most viruses
[C] It protects genetic material
[D] All of the above

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18. The lysogenic state is controlled by the activity of the regulatory region of the lambda phage genome, this region is called?
[A] immunity repressor
[B] immunity operon
[C] operon repressor
[D] none of these

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19. What type of embryo is most often used for viral assays?
[A] Mouse
[B] Rat
[C] Cat
[D] Chicken

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20. Which of the following is a non-vascular endosperm?
[A] Thallophyta
[B] Bryophyta
[C] Pteridophyta
[D] All the above

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