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MCQs

Total Questions : 219 | Page 9 of 22 pages
Question 81. Mutations in non-coding regions of DNA that have no significant results are called
  1.    neutral mutations
  2.    silent mutations
  3.    point mutations
  4.    single nucleotide polymorphisms
 Discuss Question
Answer: Option A. -> neutral mutations
Answer: (a).neutral mutations
Question 82. Which of following mass extinctions claimed about 96% of marine life?
  1.    Permian
  2.    Celurian
  3.    cretaceous
  4.    Mesozoic
 Discuss Question
Answer: Option A. -> Permian
Answer: (a).Permian
Question 83. Fruit fly is heterozygous for how much of its loci?
  1.    0.19
  2.    0.14
  3.    0.9
  4.    0.01
 Discuss Question
Answer: Option B. -> 0.14
Answer: (b).0.14
Question 84. Which of following gas causes ocean acidification?
  1.    oxygen
  2.    carbon dioxide
  3.    nitrogen
  4.    sulphur
 Discuss Question
Answer: Option B. -> carbon dioxide
Answer: (b).carbon dioxide
Question 85. Geospiza fortis is scientific name for which of following?
  1.    mice
  2.    rat
  3.    finch
  4.    toad
 Discuss Question
Answer: Option C. -> finch
Answer: (c).finch
Question 86. Which of the following is a non-competitive inhibitor against protease produced by HIV?
  1.    Tipranavir
  2.    Acetylcholinesterase
  3.    Ritonavir
  4.    Phenicols
 Discuss Question
Answer: Option A. -> Tipranavir
Answer: (a).Tipranavir
Question 87. Competitive enzyme inhibitors are ________
  1.    Reversible inhibitors
  2.    Irreversible inhibitors
  3.    Permanent inhibitors
  4.    None of the mentioned
 Discuss Question
Answer: Option A. -> Reversible inhibitors
Answer: (a).Reversible inhibitors
Question 88. Why are enzymes required?
  1.    Enzymes help to yield more product
  2.    Enzymes increase the activation energy of the reaction
  3.    Enzymes decrease the activation energy of the reaction
  4.    Enzymes maintain the equilibrium in the reaction
 Discuss Question
Answer: Option C. -> Enzymes decrease the activation energy of the reaction
Answer: (c).Enzymes decrease the activation energy of the reaction
Question 89. Feedback inhibition occurs due to _______
  1.    Excess of the reactants in the reaction
  2.    Presence of competitive inhibitor
  3.    Increase in product to a certain level
  4.    Presence of irreversible inhibitor
 Discuss Question
Answer: Option C. -> Increase in product to a certain level
Answer: (c).Increase in product to a certain level
Question 90. Allosteric enzymes are which _______
  1.    Have single subunit
  2.    Have multiple subunits
  3.    Follows Michaelis-Menten kinetics
  4.    Do not affect the binding affinity
 Discuss Question
Answer: Option B. -> Have multiple subunits
Answer: (b).Have multiple subunits

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