A substrate binding to an enzyme is most similar to a signal molecule binding to a
A)G-protein.
B)receptor.
C)kinase.
D)second messenger.
E)transcriptional factor.

Question

Quizplus · Accepted Answer

Just like a signal molecule binds to a receptor in order to initiate a specific cellular response, a substrate binds to an enzyme in order to catalyze a specific chemical reaction. Both interactions are highly specific and require a precise fit between the binding partners.

Therefore, the correct answer is B (receptor).

A Substrate Binding to an Enzyme Is Most Similar to a Signal