What is the definition of a enzyme?

A substance produced by a living organism which acts as a catalyst to bring about a specific biochemical reaction.

Answer: Proteins that speeds up the rate of a chemical reaction in a living organism.

Explanation: Enzyme: Proteins that speeds up the rate of a chemical reaction in a living organism. An enzyme acts as catalyst for specific chemical reactions, converting a specific set of reactants (called substrates) into specific products. Without enzymes, life as we know it would not exist.