Enzymes are complex globular proteins with high molecular weight involved in the catalysis of specific reactions of either single or multiple substances.
They are organic biocatalysts because of their biological origin and handle a wide range of reactions in the body called biochemical reactions very efficiently.
They work only in a particular temperature and pH calledoptimum temperature and optimum pH.
Above and below the optimum pH and temperature, the enzymes get denatured.
Structurally, they are made up of amino acid chains that are chemically attached.
It is estimated that more than 5000 biochemical reactions are catalyzed by enzymes, and hence, they are important to biological systems.