Biochemistry : Glycogenolysis Energetics

Study concepts, example questions & explanations for Biochemistry

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Example Questions

Example Question #1 : Glycogenolysis Energetics

Which of the following compounds is regenerated in the citric acid cycle?

Possible Answers:

Oxaloacetate

Citrate

Pyruvate

Succinate

Correct answer:

Oxaloacetate

Explanation:

Oxaloacetate is the four-carbon molecule that is regenerated by the enzyme malate dehydrogenase in order to continue the cycle to form citrate with acetyl-CoA in the first step of the Krebs cycle. The other answer choices are intermediates of the citric acid cycle, but only oxaloacetate is regenerated, making it a true cycle.

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