Biology MCQs

31. What are the most common diseases in cows?
[A] Bovine Viral Diarrhoea
[B] Brucellosis
[C] Foot and Mouth disease.
[D] All of the above

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32. Which chemical fertilizer is needed for better rhizobial nitrogen fixation?
[A] Phosphorus
[B] Potassium
[C] Calcium
[D] Sodium

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33. Which of the following is divalent cations are usually used to make competent cells?
[A] Carbon
[B] Nitrogen
[C] Copper
[D] Calcium

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34. When we touch leaves of “Touch me not plant”, they close, these movements are called ____:
[A] Seismonastic movements
[B] Photonastic movements
[C] Nyctinastic movements
[D] Chemonastic movements

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35. How the rate of absorption of water through roots can be increased?
[A] Keeping the plants under the fan
[B] Keeping the plants in the dim light
[C] Keeping the plants in the shade
[D] Covering the plants with a polythene bag

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36. Which of the following vitamins are water soluble?
[A] Vitamin A and Vitamin B
[B] Vitamin B and Vitamin C
[C] Vitamin C and Vitamin D
[D] Vitamin A and Vitamin D

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37. Which one of the following animals belongs to mollusca?
[A] Haliotis
[B] Hare
[C] Hydra
[D] Hyla

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38. What are Lipids?

[A] Lipids are monosaccharides
[B] Lipids do not provide energy to cells
[C] Fruits are a good source of lipids
[D] Cholesterol and trans fatty acids are types of Lipids

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39. At which stage in its life cycle does the silkworm yield the fibre of commercial use?
[A] Imago
[B] Larva
[C] Egg
[D] Pupa

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40. Which one of the following is the respiratory pigment in man?
[A] Haemocyanin
[B] Haemoerythrin
[C] Haemoglobin
[D] b-Carotene

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