In the first step of the electron transport chain, the coenzymes NADH and FADH2 are oxidized.
Indicate whether this statement is true or false.
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Question 2) The electron transport chain
A. does not require oxygen, and involves proteins in the outer membrane of mitochondria.
B. does not require oxygen, and involves proteins in the cristae of mitochondria.
C. requires oxygen, and involves proteins in the outer membrane of mitochondria.
D. requires oxygen, and involves proteins in the cristae of mitochondria.
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Question 3) The proteins in the electron transport chain transport H+
A. from the cytosol to the matrix.
B. from the matrix to the outer compartment.
C. from the outer compartment to the cytosol.
D. from the outer compartment to the matrix.
E. from the cristae to the matrix.
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Question 4) The enzyme that harnesses the energy of H+ diffusion down its concentration gradient within a mitochondrion to make high-energy molecules for the cell is
A. ATP phosphatase.
B. ATP synthetase.
C. pyruvate decarboxylase.
D. succinic dehydrogenase.
E. creatine phosphatase.
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Question 5) Oxidative phosphorylation within the electron transport system accounts for a little less than half of the ATP synthesized from the breakdown of glucose.
Indicate whether this statement is true or false.
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Question 6) One turn of the citric acid cycle results in the formation of
A. 1 ATP, 3 NADH, and 1 FADH2.
B. 2 pyruvates and 2 ATP.
C. 2 ATP, 2 NADH+, and 3 FADH.
D. 2 citrates, 4 ATP, and 3 FADH2.
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Question 7) The coenzymes that will provide the electrons needed for the electron transport system are
A. NADH and FADH2.
B. NAD and FAD+.
C. acetyl CoA and citrate.
D. pyruvate and NADH.
E. FAD and decarboxylase.
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Question 8) During the citric acid cycle, an acetyl CoA molecule produced in the intermediate stage combines with a molecule of
A. oxaloacetic acid.
B. pyruvate.
C. citrate.
D. succinate.
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Question 9) The citric acid cycle involves
A. a multienzyme complex within the cytosol.
B. several enzymes within the matrix of the mitochondrion.
C. a multienzyme complex within the outer compartment of the mitochondrion.
D. several enzymes within the cytosol and the outer membrane of the mitochondrion.
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Question 10) Decarboxylation occurs during the intermediate stage of aerobic cellular respiration.
Indicate whether this statement is true or false.
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