Question

the specific reactant that binds to a specific enzyme is known as?

molecule

substrate

active site

induced fit

Explanation:

Enzymes are biological catalysts. The substrate is the specific reactant that binds to an enzyme. A molecule is a general term for a group of atoms bonded together. The active site is the region on the enzyme where the substrate binds. Induced fit is a model describing how the enzyme - substrate complex forms.

Answer:

Substrate