Biology MCQs

31. Double Vagina is found in which of the following?
[A] Monotremata
[B] Eutheria
[C] Marsupials
[D] All of the above

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32. Which of the following makes bones so strong?
[A] Silica
[B] Cartilage
[C] Blood and marrow
[D] Calcium and phosphorous

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33. What is the diameter of thick filaments?
[A] 10nm
[B] 16mm
[C] 12nm
[D] 16nm

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34. Approximately how many liters of blood does the heart pump throughout the body in a day?
[A] 9.7 litres
[B] 7.7 litres
[C] 5.7 litres
[D] 3.7 litres

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35. Which statement is true about Passive Immunity?
[A] This immunity causes reactions
[B] This immunity develops immediately
[C] This immunity lasts only for a few weeks or months
[D] All of the above

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36. Chemical digestion of food occurs by biological catalysts __
[A] enzymes
[B] villi
[C] glycogen
[D] egestion

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37. Which of the following is NOT a function of restriction enzymes?
[A] Cleaving DNA at specific sites
[B] Generating fragmentation patterns of DNA
[C] Creating recombinant DNA
[D] Synthesizing new DNA strands

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38. Bt toxin is produced by a bacterium called __.
[A] Bacillus thuringiensis
[B] Bacillus anthracis
[C] Bacillus thermophilus
[D] Bacillus subtilis

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39. Production of alcohol from organic compounds by microorganisms is known as ____:
[A] Anaerobic respiration
[B] Aerobic respiration
[C] Combustion
[D] Fermentation

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40. Animal protein is called first class protein because it is _____:
[A] Rich in essential amino acids
[B] d
Delicious in taste
[C] Cheaper in the market
[D] Easily digestible

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