Biology MCQs

11. Phenylketonuria is an example of an in born error of metabolism. This “error” refers to which of the following phenomenon? (UPSC Prelims 1994)
[A] hormonal overproduction
[B] atrophy of endocrine glands
[C] inherited lack of an enzyme
[D] non-disjunction

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12. Which one of the following sets is correctly matched? (UPSC Prelims 1995)
[A] Diphtheria, Pneumonia and Leprosy : Hereditary
[B] AIDS, Syphilis and Gonorrhoea : Bacterial
[C] Colour blindness, Hemophilia and Sickle cell anaemia : Sex linked
[D] Polio, Japanese B encephalitis and plague : Viral

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13. Which one of the following is not an essential micronutrient for plants? (UPSC Prelims 1996)
[A] Boron
[B] Zinc
[C] Sodium
[D] Copper

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14. In which of the following Alpha-keratin, a protein is present? (UPSC Prelims 2002)
[A] Blood
[B] skin
[C] wool
[D] eggs

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15. Study of the chemical nature of cells and tissues is known as__?
[A] Biochemistry
[B] Conchology
[C] Histochemistry
[D] Dermatology

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16. Which of the following vitamins was discovered by Sir Edward Mellanby?
[A] Vitamin C
[B] Vitamin D
[C] Vitamin K
[D] Vitamin E

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17. The change from lysogeny to lymph is usually induced by?
[A] ultraviolet light
[B] chemicals
[C] irradiation
[D] all of these

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18. Whooping cough is caused by which of the following?
[A] Bordetella pertussis
[B] Helicobacter pylori
[C] Yersinia pestis
[D] Treponema pallidum

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19. Which of the following is the smallest gymnosperm?
[A] Cycas
[B] Pinus
[C] Zamia
[D] Gnetum

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20. Which of the following is not a part of the flower?
[A] Petals
[B] Sepals
[C] Pistil
[D] Pericarp

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