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 biological catalysts (proteins) that speed up reactions. They have an active site (lock) where specific substrates (key) bind, showing the lock - and - key model. Enzymes increase reaction rates (not decrease). They function in living organisms. Each enzyme is specific to a few or one reaction (not many different ones).

Answer:

Enzymes and substrates fit together like a lock and key.