Question

which of the following statements about enzymes is true? enzymes are not substrate - specific. enzymes are not chemically altered in a chemical reaction. enzymes are able to function at any temperature. enzymes slow down chemical reactions.

Explanation:

Enzymes are biological catalysts. They are substrate - specific, not chemically altered during a reaction (they can bind to substrates, facilitate the reaction and then be released unchanged), have an optimal temperature range for function and they speed up (catalyze) chemical reactions, not slow them down.

Answer:

B. Enzymes are not chemically altered in a chemical reaction.