Question

fill in the blank question

an enzyme acts as a biological blank that alters the rate of a reaction without being changed by the reaction.

Explanation:

Identify the definition of an enzyme

An enzyme is a protein molecule that speeds up chemical reactions in biological systems.

Determine the standard scientific term

A substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change is called a catalyst. In biological contexts, enzymes are specifically referred to as biological catalysts.

Answer:

An enzyme acts as a biological <blank>catalyst</blank> that alters the rate of a reaction without being changed by the reaction.