Question

quiz! a reactant that fits into the active site of an enzyme is called. a a substrate b a product c a concentration d an object

Explanation:

In biochemistry, an enzyme - substrate complex is formed when a substrate binds to the active - site of an enzyme. Products are formed after the reaction occurs. Concentration refers to the amount of a substance in a given volume, and 'an object' is a non - specific term not related to this biochemical concept.

Answer:

A. a substrate