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MCQs

Total Questions : 211 | Page 21 of 22 pages
Question 201. Which of the following is not a feature of oxidative phosphorylation?
  1.    A protonmotive force
  2.    A membrane bound ATP synthase
  3.    Direct transfer of phosphate from a substrate molecule to ADP
  4.    An electrochemical gradient across the inner mitochondrial membrane
 Discuss Question
Answer: Option C. -> Direct transfer of phosphate from a substrate molecule to ADP
Question 202. How many CO2 molecules are exhaled for each O2 molecule utilized in cellular respiration?
  1.    3
  2.    6
  3.    1
  4.    12
 Discuss Question
Answer: Option C. -> 1
Question 203. Lactic acid is produced by human muscles during strenuous exercise because of lack of
  1.    ADP and Pi
  2.    NAD+
  3.    oxygen
  4.    glucose
 Discuss Question
Answer: Option C. -> oxygen
Question 204. What happens after glycolysis when oxygen is available as an electron acceptor?
  1.    NADH is produced
  2.    Fermentation
  3.    Pyruvate is formed
  4.    Oxidative phosphorylation
 Discuss Question
Answer: Option A. -> NADH is produced
Question 205. Which of the following is not a significant biological oxidizing agent?
  1.    O2
  2.    NAD+
  3.    Fe3+
  4.    FAD
 Discuss Question
Answer: Option C. -> Fe3+
Question 206. The complete oxidation of glucose yields usable energy in the form of
  1.    ATP
  2.    pyruvic acid
  3.    FADH2
  4.    coenzyme A
 Discuss Question
Answer: Option A. -> ATP
Question 207. Which of the following is correct sequence of processes in the oxidation of glucose?
  1.    Glycolysis - Krebs cycle - eletron transport
  2.    Krebs cycle - glycolysis - electron transport
  3.    Electron transport - Krebs cycle - glycolysis
  4.    Krebs cycle - electron transport - glycolysis
 Discuss Question
Answer: Option A. -> Glycolysis - Krebs cycle - eletron transport
Question 208. In electron transport, electrons ultimately pass to
  1.    cytochrome b
  2.    none of these
  3.    oxygen
  4.    ADP
 Discuss Question
Answer: Option C. -> oxygen
Question 209. The aerobic breakdown of glucose known as respiration involves
  1.    Krebs Cycle
  2.    glycolysis
  3.    electron transport phosphorylation
  4.    all of the above
 Discuss Question
Answer: Option D. -> all of the above
Question 210. During electron transport, protons are pumped out of the mitochondrion at each of the major sites except for
  1.    complex III
  2.    complex I
  3.    complex II
  4.    complex IV
 Discuss Question
Answer: Option C. -> complex II

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