Which type of mechanism is NOT known to play a role in the reversible alteration of enzyme activity?
A) activation by cleavage of an inactive zymogen
B) allosteric response to a regulatory molecule
C) alteration of the synthesis or degradation rate of an enzyme
D) covalent modification of the enzyme
E) interactions between catalytic and regulatory subunits

Question

Quizplus · Accepted Answer

Activation by cleavage of an inactive zymogen is an irreversible process, as it involves the permanent modification of the enzyme structure by cleaving a portion of the molecule to activate it. The other mechanisms listed can be reversed and thus play a role in the reversible alteration of enzyme activity.

Which Type of Mechanism Is NOT Known to Play a Role