Biology MCQs

31. In incomplete dominance__.
[A] Phenotype of both alleles is expressed
[B] Phenotype of only one allele is expressed
[C] Phenotype of neither of the alleles are expressed
[D] Phenotype of both alleles is partially expressed

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32. Restriction enzymes were discovered by?
[A] Smith and Nathans
[B] Alexander Fleming
[C] Berg
[D] None of these

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33. Which of the following diseases are not caused by smog?

[A] Breathing problem
[B] Throat cancer
[C] Skin cancer
[D] Rickets

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34. Eyes must be removed within ___ hours after the death for eye donation:
[A] 6
[B] 8
[C] 12
[D] 24

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35. Which part becomes modified as the tusk of elephant?
[A] Premolar
[B] Second incisor
[C] Molar
[D] Canine

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36. Cinnamon is obtained from which part of the plant?
[A] Bark
[B] Stem
[C] Fruits
[D] Roots

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37. The tissue in man where no cell division occurs after birth is ____:
[A] Nerves
[B] Skeletal
[C] Connective
[D] Germinal

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38. A pair of contrasting characters controlling the same trait is called ____:
[A] Allele
[B] Loci
[C] Factors
[D] Lineage

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39. The sugar present in DNA is ____:
[A] Pentose
[B] Xylulose
[C] Hexose
[D] Heptulose

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40. The liberation of oxygen during photosynthesis is due to ____:
[A] Reduction of CO2
[B] Hydrolysis of carbohydrates
[C] Breakdown of chlorophyll
[D] Photolysis of water

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