Question

which statement best explains how enzymes speed up a chemical reaction? enzymes remove heat from a chemical reaction. enzymes lower the activation energy of a chemical reaction. enzymes are not changed as a result of a chemical reaction. enzymes add heat to a chemical reaction.

Explanation:

Enzymes are biological catalysts. They speed up chemical reactions by lowering the activation energy required for the reaction to occur. They are not consumed or changed during the reaction. Adding or removing heat is not their function in speeding up reactions.

Answer:

Enzymes lower the activation energy of a chemical reaction.