25.

For an enzyme to catalyze (speed up) a chemical reaction, the active site must -

A.Have a complementary shape to the substrate
B.Cause the enzyme to be destroyed by the reaction
C.Increase the activation energy level
d.Be occupied by an inhibitor

1 answer

The correct answer is:

A. Have a complementary shape to the substrate

For an enzyme to effectively catalyze a reaction, the active site must fit the substrate, which allows the enzyme to bind to the substrate and facilitate the reaction.