Question

An enzyme, citrate synthase, in the Krebs cycle is inhibited by ATP. This is an example of all of the following EXCEPT

A) noncompetitive inhibition.
B) allosteric inhibition.
C) feedback inhibition.
D) competitive inhibition.

Answer 1

The correct answer is option D, B

ATP is an allosteric inhibitor of citrate synthase.

The ATP binds to the active site and continuously changes the shape of an allosteric site which inhibits the tendency of the e substrate to be unable to bind to the active site