AP Biologymediummcq1 pt
Feedback inhibition of a pathway occurs when
A.an end product inhibits an early enzyme
B.the substrate activates the last enzyme
C.an enzyme destroys its own gene
D.products are always overproduced
Explanation
Core Concept
In feedback inhibition, accumulation of a pathway's end product reduces further pathway activity by inhibiting an enzyme at an earlier regulatory step. The target is often an early or committed step because that prevents unnecessary consumption of upstream resources, but it is too strong to claim that the first committed enzyme is always the target.
Correct Answer
Aan end product inhibits an early enzyme
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