Which of the Following Regarding Enzyme Regulation is Correct

Question

Which of the following regarding enzyme regulation is correct?
A)The activity of an enzyme is covalently affected by allosteric regulators.
B)Enzymes can be activated by the products they produce.
C)Enzymes can only be inactivated by the addition of a functional group.
D)Coenzyme and substrate availability can regulate enzyme reaction rate.

Accepted Answer

Coenzyme and substrate availability can regulate enzyme reaction rate. This is because enzymes require specific coenzymes and substrates to function properly, and the availability of these molecules can directly impact the rate of enzyme-catalyzed reactions. Allosteric regulation occurs when a molecule binds to the enzyme at a site other than the active site and either activates or inhibits its function, but this does not involve covalent modification of the enzyme. Enzymes being activated by the products they produce is an example of feedback inhibition, but not a general rule of enzyme regulation. Inactivation of enzymes can occur through a variety of mechanisms, which may or may not involve the addition of a functional group.