The active site of an enzyme is the region that
A) binds allosteric regulators of the enzyme.
B) binds substrates for the enzyme.
C) binds noncompetitive inhibitors of the enzyme.
D) is inhibited by the presence of a coenzyme or a cofactor.

Question

Quizplus · Accepted Answer

The active site of an enzyme is the region that specifically binds the enzyme's substrate, allowing the enzyme to catalyze a chemical reaction. Therefore, the correct choice is B – the active site binds substrates for the enzyme. The other choices, such as allosteric regulators, noncompetitive inhibitors, and coenzymes/cofactors, may interact with the enzyme but are not part of the active site.

The Active Site of an Enzyme Is the Region That