Biology MCQs

31. Which of the following is/are agent(s) of infection?

[A] Physical contact
[B] Water
[C] Vectors
[D] All of the above

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32. The pigment that gives human skin, hair and eyes their colour is called ____:
[A] Quinacridone
[B] Alizarin
[C] Melanin
[D] Phthalocyanine

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33. Mycobacterium leprae is a ____:
[A] Bacillus
[B] Spiral
[C] Coccus
[D] Spore

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34. Activity of an enzyme can be modulated by change of
____:
[A] pH
[B] Light
[C] Humidity
[D] Rainfall

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35. Silk worms feed on
____:
[A] Basil leaves
[B] Mulberry leaves
[C] Curry leaves
[D] Rose leaves

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36. Match correctly the Nutrient defficiency given in List-I with the diseases caused by the deficiency given in List-II:

(a) Iodine
(b) Iron
(c) Niacin
(d) Vitamin Bl2

(i) Microcytic anaemia
(ii) Pernicious anaemia
(iii) Goitre
(iv) Pellagia Codes

[A] (iv), (ii), (i), (iii)
[B] (i), (iii), (ii), (iv)
[C] (ii), (iv), (iii), (i)
[D] (iii), (i), (iv), (ii)

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37. Bones are pneumatic in ____:
[A] Birds
[B] Fishes
[C] Reptiles
[D] Amphibians

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38. Which is a water soluble Vitamin?

[A] Vitamin A
[B] Vitamin C
[C] Vitamin D
[D] Vitamin K

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39. Hepatitis is caused by _____:
[A] Parasite
[B] Bacteria
[C] Fungus
[D] Virus

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40. Stem is usually _____:
[A] Positively Phototropic
[B] Negatively Phototropic
[C] Negatively geotropic
[D] Positively acrotropic

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