Define enzymes and its classification?A substance produced by a living organism which acts as a catalyst to bring about a specific biochemical reaction.

1. Oxidoreductases   are a class of enzymes that facilitates (catalyzes) the transfer of electrons from reductants (electron donors) to oxidants (electron acceptors). This type of reaction is also known as an oxidoreduction reaction.

2. Transferase  is the general name for the class of enzymes that enact the transfer of specific functional groups (e.g. a methyl or glycosyl group) from one molecule (called the donor) to another (called the acceptor).

 3. Hydrolase is an enzyme that catalyzes the hydrolysis of a chemical

bond. For example, an enzyme that catalyzed the following reaction is a hydrolase:

4. Lyase  Is an enzyme that catalyzes the breaking (an "elimination" reaction) of various chemical bonds by means other than hydrolysis (a "substitution" reaction) and oxidation, often forming a new double bond or a new ring structure.

5 Isomerase Any one of a class of enzymes that catalyze reactions involving a structural rearrangement of a molecule. Alanine racemase, for example, catalyzes the conversion of L-alanine into its isomeric (mirror-image) form, D-alanine. An isomerase called mutarotase catalyzes the conversion of alpha-d-glucose into beta-d-glucose.

6 Ligase  (from the Latin verb ligāre — "to bind" or "to glue together") is an enzyme that can catalyze the joining of two large molecules by forming a new chemical bond, usually with accompanying hydrolysis of a small chemical group dependent to one of the larger molecules or the ...