Enzymes can be defined as biological polymers that catalyze biochemical reactions.” 
➢The majority of enzymes are proteins with catalytic capabilities crucial to perform different processes.
➢Metabolic processes and other chemical reactions in the cell are carried out by a set of enzymes that are necessary to sustain life.
➢ Enzymes are found in all tissues and fluids of the body.
➢ Catalysis of all reactions taking place in metabolic pathways is carried out by intracellular enzymes.
➢The enzymes in the plasma membrane govern the catalysis in the cells as a  response to cellular signals and enzymes in the circulatory system regulate the clotting of blood.
➢Most of the critical life processes are established on the functions of enzymes.