Question

In which of the following phenomenon the end product act as co-repressor and repress the synthesis of metabolic enzymes?

(a) Allosteric regulation

(b) Feedback repression

(c) Feedback inhibition

(d) Regulation by phosphorylation

The question was asked by my college professor while I was bunking the class.

Asked question is from Metabolism in division Bioenergetics and Metabolism of Life Sciences

Answer 1

The correct choice is (b) Feedback repression

To explain: Feedback repression is different from feedback inhibition, here the end product of the pathway acts as a co-repressor and represses the synthesis of an enzyme which is required at the earlier stage of the pathway.