6. The AG of the citric acid cycle reaction catalyzed by succinyl-CoA synthetase is approximately 0 kJ/mol. Which of the following statements explains why we would expect this reaction to be highly exergonic, but why the overall AG = 0 in reality. A) The reaction cleaves a thioether linkage, and the released free energy is used to generate a new thioester linkage in a product molecule. B) The reaction cleaves a thioester linkage, and the released free energy is used to generate GTP. C) The reaction cleaves a thioester linkage, and the released free energy is used to generate a new thioester linkage in a product molecule. D) None of the above

6. The AG of the citric acid cycle reaction catalyzed by succinyl-CoA synthetase is approximately 0 kJ/mol. Which of the following statements explains why we would expect this reaction to be highly exergonic, but why the overall AG = 0 in reality. A) The reaction cleaves a thioether linkage, and the released free energy is used to generate a new thioester linkage in a product molecule. B) The reaction cleaves a thioester linkage, and the released free energy is used to generate GTP. C) The reaction cleaves a thioester linkage, and the released free energy is used to generate a new thioester linkage in a product molecule. D) None of the above

Biochemistry

6th Edition

ISBN:9781305577206

Author:Reginald H. Garrett, Charles M. Grisham

Publisher:Reginald H. Garrett, Charles M. Grisham

Chapter20: Electron Transport And Oxidative Phosphorylation

Section: Chapter Questions

Problem 11P

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The reaction catalyzed by malate dehydrogenase has a ΔG°′ value of +29.7 kJ⋅mol−1. Given what this says about the occurrence of the reaction catalyzed by malate dehydrogenase in cells explain how the reaction catalyzed by citrate synthase (−31.5 kJ⋅mol−1) influences that activity of malate dehydrogenase. In addition, explain how the activity of citrate synthase functions as a regulatory point for the citric acid cycle
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