Multiple choice

Which of the following enzymes catalyzes substrate level phosphorylation in Kreb's cycle?

  1. Malate dehydrogenase

  2. Phosphoenolpyruvate carboxykinase

  3. Succinate thiokinase

  4. Succinate dehydrogenase
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This enzyme catalyzes the reversible reaction of succinyl-CoA to succinate during TCA cycle. It aids in the the coupling of this reaction to the formation of a nucleoside triphosphate molecule (either GTP or ATP) from an inorganic phosphate molecule and a nucleoside diphosphate molecule (either GDP or ADP).

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