The conversion of succinate to fumarate in the TCA cycle is coupled to the formation of: O NADPH Îź ATP O GTP O NADH O FADH2
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The reaction of the citrate cycle produces the equivalent of ATP (in the form of GTP). phosphorylation at the substrate level. This reaction takes place by converting: a) fumarate to malate b) malate to oxaloacetate c) succinate to malate d) succinyl-CoA to succinate
Tanvi G.
2. The enzyme succinate dehydrogenase catalyzes the oxidation of succinate. What is the product of this reaction? A) oxaloacetate D) malate B) citrate E) None of the choices are correct. C) fumerate 3. In oxidative phosphorylation, how many molecules of ATP are produced per molecule of NADH in the mitochondrion? A) 2 B) 3 C) 4 D) 5 E) 6 4. How many molecules of ATP can be produced by the complete oxidation of one molecule of glucose by glycolysis and the citric acid cycle? A) 3 B) 9 C) 18 D) 24 E) 36
Shaiju T.
Learning Check Which of the following conversions occurring in the citric acid cycle is coupled to a substrate-level phosphorylation reaction? a. Acetyl-CoA + oxaloacetate → citrate + CoA b. Alpha-ketoglutarate + CoA → succinyl-CoA + carbon dioxide c. Isocitrate → alpha-ketoglutarate + carbon dioxide d. Succinate → fumarate e. Succinyl-CoA → succinate + CoA Learning Check Which of the following best describes the net organic products formed during the oxidation of one acetyl group to two molecules of carbon dioxide via the citric acid cycle a. 1 NADH + 3 FADH2 + 1 GTP b. 2 NADH + 2 FADH2 + 2 ATP c. 3 NADH d. 3 NADH + 1 FADH2 + 1 GTP e. 6 NADH + 6 ATP
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