4. Metabolism

Metabolic Regulation — Quiz

Test your understanding of metabolic regulation with 5 practice questions.

Practice Questions

Question 1

What term describes activation of an enzyme by a metabolite produced in an earlier step of the same pathway?

Question 2

Which enzyme dephosphorylates acetyl‐CoA carboxylase to restore its activity in lipogenic tissues?

Question 3

In hepatocytes after a meal when insulin is high, what covalent modification and activity change occur to acetyl‐CoA carboxylase?

Question 4

Insulin stimulates the transcription factor SREBP-1c to increase expression of which key lipogenic enzyme?

Question 5

During muscle contraction, increased intracellular Ca^{2+} affects the pyruvate dehydrogenase complex by: