Question

which statement about enzymes is true? an enzyme functions to decrease the rate of a chemical reaction. enzymes are proteins that function as catalysts in nonliving things. each enzyme can catalyze many different biochemical reactions. enzymes and substrates fit together like a lock and key.

Explanation:

Enzymes are proteins that act as catalysts in biochemical reactions in living things. They lower the activation - energy of a reaction, increasing the rate of the reaction. Each enzyme is specific to one or a few substrates and they fit together like a lock and key.

Answer:

Enzymes and substrates fit together like a lock and key.