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 non - living 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 living organisms, increasing the rate of chemical reactions. They have a high - specificity for their substrates and bind to them in a lock - and - key or induced - fit model. Each enzyme typically catalyzes a specific biochemical reaction.

Answer:

Enzymes are proteins that function as catalysts in living things.