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MCQs

Total Questions : 211 | Page 11 of 22 pages
Question 101. Membrane potential and the proton gradient
  1.    are both required to make ATP
  2.    are sufficient, separately, to make ATP from ADP + Pi;
  3.    reinforce one another when respiratory inhibitors are present
  4.    cancel one another when uncouplers are present
 Discuss Question
Answer: Option A. -> are both required to make ATP
Answer: (a).are both required to make ATP
Question 102. The irreversibility of the thiokinase reactions (formation of initial acyl-CoA)
  1.    make this activation reaction the committed step on the pathway
  2.    is due to the subsequent hydrolysis of the product
  3.    applies only to even-chain fatty acids
  4.    both (a) and (b)
 Discuss Question
Answer: Option D. -> both (a) and (b)
Answer: (d).both (a) and (b)
Question 103. The oxidation of methanol (wood alcohol) in human retina tissue leads directly to the formation of
  1.    formaldehyde
  2.    sugars
  3.    CO₂
  4.    none of these
 Discuss Question
Answer: Option A. -> formaldehyde
Answer: (a).formaldehyde
Question 104. Long-chain fatty acids are oxidized step-wise in one carbon units starting from the
  1.    carboxyl end
  2.    aliphatic end
  3.    both (a) and (b)
  4.    none of these
 Discuss Question
Answer: Option A. -> carboxyl end
Answer: (a).carboxyl end
Question 105. How many molecules of acetyl-CoA are produced in oxidation of palmitic acid (C₁₆), which involves seven rounds of oxidation?
  1.    6
  2.    7
  3.    8
  4.    9
 Discuss Question
Answer: Option C. -> 8
Answer: (c).8
Question 106. Which one of the following is not the intermediate of Kreb's cycle?
  1.    Isocitrate
  2.    Succinate
  3.    Fumarate
  4.    Stearate
 Discuss Question
Answer: Option D. -> Stearate
Answer: (d).Stearate
Question 107. How many ATPs are produced during citric acid cycle?
  1.    10
  2.    13
  3.    12
  4.    8
 Discuss Question
Answer: Option C. -> 12
Answer: (c).12
Question 108. In eukaryotes, electron transport occurs in
  1.    membranes and mitochondria
  2.    endoplasmic reticulum
  3.    cytoplasm
  4.    all of the above
 Discuss Question
Answer: Option A. -> membranes and mitochondria
Answer: (a).membranes and mitochondria
Question 109. The FADH₂ and NADH produced by the oxidation of one acetyl-CoA results in the synthesis of about-
  1.    3 ATPs
  2.    6 ATPs
  3.    11 ATPs
  4.    15 ATPs
 Discuss Question
Answer: Option C. -> 11 ATPs
Answer: (c).11 ATPs
Question 110. Which one is not the main protein in electron transport chain?
  1.    NADH dehydrogenase
  2.    Cytochrome bc1 complex
  3.    Cytochrome oxidase
  4.    Citrate synthease
 Discuss Question
Answer: Option D. -> Citrate synthease
Answer: (d).Citrate synthease

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