Enzymes / ˈɛnzaɪmz / are proteins that act as biological catalysts (biocatalysts). Catalysts accelerate chemical reactions. The molecules upon which enzymes may act are called substrates, and the enzyme converts the substrates into different molecules known as products.
Enzymes present in the living organisms enhance the rate of reactions which take place within the body. Biological catalysts, enzymes, are extremely specific that catalyze a single chemical reaction or some closely associated reactions. An enzyme’s exact structure and its active site decide an enzyme’s specificity.
Metabolic processes and other chemical reactions in the cell are carried out by a set of enzymes that are necessary to sustain life. The initial stage of metabolic process depends upon the enzymes, which react with a molecule and is called the substrate. Enzymes convert the substrates into other distinct molecules and are called the products.