The following questions are based on the reaction A + B → C + D shown in Figure 8.2.

-The mechanism in which the end product of a metabolic pathway inhibits an earlier step in the pathway is known as
A)metabolic inhibition.
B)feedback inhibition.
C)allosteric inhibition.
D)noncooperative inhibition.
E)reversible inhibition.

Question

The following questions are based on the reaction A + B → C + D shown in Figure 8.2.

-The mechanism in which the end product of a metabolic pathway inhibits an earlier step in the pathway is known as
A)metabolic inhibition. 
B)feedback inhibition. 
C)allosteric inhibition. 
D)noncooperative inhibition. 
E)reversible inhibition.

Quizplus · Accepted Answer

The mechanism in which the end product of a metabolic pathway inhibits an earlier step in the pathway is known as feedback inhibition. This is the only option given that accurately describes this mechanism. Choice A, metabolic inhibition, is not a specific term and could refer to a variety of different mechanisms. Choice C, allosteric inhibition, is a mechanism in which an inhibitor binds to a site on an enzyme that is different from the active site, causing a conformational change that reduces the enzyme's activity. This is not necessarily the same as feedback inhibition. Choice D, noncooperative inhibition, and choice E, reversible inhibition, do not accurately describe the mechanism of feedback inhibition.

The Following Questions Are Based on the Reaction a