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Enzymes Definition
What Are Enzymes?

A protein molecule produced by living organisms that catalyzes chemical reactions of other substances without itself being destroyed or altered upon completion of the reactions. Enzymes are a group of proteins which act as biological catalysts speed up specific chemical reactions, such as the digestion of food. In the absence of enzymes, these reactions often require very high temperatures and pressures. Although enzymes take part in the reactions, they are not chemically altered by them. The body varies the concentration of a particular enzyme to regulate a specific activity; generally, the higher the enzyme concentration, the greater the rate of reaction. Enzymes are specific for both the compounds acted on (the substrates) and the reactions carried out. Because they are proteins, enzymes are permanently inactivated by heat, strong acid or alkali, and other conditions which cause denaturation of proteins.

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