AP BIOLOGY

Detailed explanation-1: -Enzymes are proteins that catalyze a chemical reaction in our body. They function as a catalyst that speeds up the reaction by lowering the activation energy. The enzyme accelerates a chemical reaction without changing its equilibrium, so it is called as a biocatalyst.

Detailed explanation-2: -Enzymes are proteins that act as catalysts in biochemical reactions.

Detailed explanation-3: -Enzymes speed up (catalyze) chemical reactions in cells. More specifically, they lower the threshold necessary to start the intended reaction. They do this by binding to another substance known as a substrate.