Biology MCQs

31. Which of the following is best maintains intestinal health?
[A] Starches
[B] Vitamins
[C] Fiber
[D] Fat

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32. The female Reproductive System creates egg cells that are essential for reproduction known as __
[A] Menstrual Cycle
[B] Pregnancy
[C] Fertilization
[D] Ova

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33. A nitrogen-fixing bacterium that forms loose associations with the roots of crop plants is __.
[A] Azotobacter
[B] Bacillus polymyxa
[C] Clostridium
[D] Azospirillum

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34. Which of the following is not used as biomass?
[A] Hybrid poplar
[B] Willow algae
[C] Iron nails
[D] Trap grease

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35. What is Alzheimer’s disease?
[A] It affects liver
[B] It is a disorder of the brain
[C] It affects kidney
[D] It affects human immune system

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36. What is the normal blood pressure in human beings?

[A] 120/90
[B] 120/80
[C] 140/90
[D] 140/100

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37. Which of the following cell organelle contains DNA apart from nucleus?
[A] Golgi Apparatus
[B] Mitochondria
[C] Cytoplasm
[D] Ribosome

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38. The colour change in the Chameleon is due to the presence of ____:
[A] Chromatophore
[B] Haemoglobin
[C] Chlorophyll
[D] Pneumatophore

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39. Commonest mammal is ____:
[A] Elephant
[B] Lion
[C] Human
[D] Panther

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40. The biggest single-celled organism is ____:
[A] Yeast
[B] Amoeba
[C] Acetobacter
[D] Acetabularia

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