Biology MCQs

31. Which of the following is the lens of the eye?
[A] Concave
[B] Convex
[C] Biconcave
[D] Biconvex

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32. Myopia and hypermetropia can be corrected by __
[A] Concave and a plano-convex lens
[B] Concave and convex lens
[C] Convex and concave lens
[D] Plano-concave lens for both defects

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33. What is the name of the only moving bone in the human skull?
[A] Ethmoid bone
[B] Mandible bone
[C] Nasal bone
[D] Lacrimal bone

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34. Which of the following is the most fatal non-infectious disease?
[A] AIDS
[B] Cancer
[C] Diabetes
[D] Obesity

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35. 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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36. A process where new combinations of alleles are formed is called?
[A] Genetic Drift
[B] Mutation
[C] Genetic Recombination
[D] Natural selection

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37. Blue-Green algae are __
[A] Symbiotic Nitrogen-Fixing Cyanobacteria
[B] Free-Living Nitrogen-Fixing Bacteria
[C] Loose Association of Nitrogen-Fixing Bacteria
[D] Symbiotic Nitrogen-Fixing Bacteria

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38. Which of the following initiates replication in DNA?
[A] DNA ligase
[B] Origin of replication
[C] Termination sequences
[D] Histone proteins

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39. What is an autonomously repeating circular extra-chromosomal DNA?
[A] Bacteria
[B] Nitrogenous base
[C] RNA
[D] Plasmid

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40. Crossing-over occurs during ____:

[A] Diplotene
[B] Pachytene
[C] Leptotene
[D] Zygotene

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