Feedback inhibition differs from repression because
feedback inhibition
A) is less precise
B) stops the action of preexisting enzymes
C) is slower acting
D) stops the synthesis of new enzymes
E) all of the above
Answer (2)
Feedback inhibition stops the action of preexisting enzymes, while repression inhibits the synthesis of new enzymes. Feedback inhibition is faster and less precise, acting directly on enzymes rather than through genetic regulation. Thus, feedback inhibition fundamentally operates differently from repression. ;
Feedback inhibition regulates enzyme activity by stopping preexisting enzymes when their end product is abundant. It differs from repression, which inhibits the synthesis of new enzymes through genetic regulation. Therefore, the correct choice is B) stops the action of preexisting enzymes.
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