Question

1. define the term enzyme. describe how enzymes influence metabolic reactions in the cell

Explanation:

An enzyme is a biological catalyst, usually a protein, that speeds up chemical reactions in the cell. It does this by lowering the activation - energy required for a metabolic reaction to occur. Enzymes are highly specific to the substrates they act upon, binding to them at an active - site and facilitating the conversion of substrates into products.

Answer:

An enzyme is a biological catalyst (usually a protein) that speeds up metabolic reactions in the cell by lowering the activation - energy and is specific to its substrate.