An enzyme, citrate synthase, in the Krebs cycle is inhibited by ATP. This is an example of all of the following EXCEPT
A) feedback inhibition.
B) competitive inhibition.
C) noncompetitive inhibition.
D) allosteric inhibition.

Question

Quizplus · Accepted Answer

Citrate synthase inhibition by ATP is an example of feedback inhibition, noncompetitive inhibition, and allosteric inhibition, but not competitive inhibition, as ATP does not compete with the substrate for the active site.

An Enzyme, Citrate Synthase, in the Krebs Cycle Is Inhibited