<human>:  What are enzymes and what is their role in the body?
<bot>: Enzymes are proteins that act as catalysts in biochemical reactions. They are responsible for many of the metabolic processes in the body, such as breaking down food, helping digest nutrients, and producing energy. They are also involved in the manufacturing of nucleic acid, hormones, and other important molecules. Enzymes provide the energy which is needed for many of the body's natural functions, including tissue repair and growth.