Question

what is a substrate? a molecule that acts as a catalyst a place on the enzyme where the reaction occurs a place on the product where the enzyme fits a reactant that is catalyzed by an enzyme

Explanation:

• A substrate is a reactant that an enzyme acts upon.
• A molecule that acts as a catalyst is an enzyme.
• The place on the enzyme where the reaction occurs is the active site.
• There is no such thing as a place on the product where the enzyme fits.

Answer:

a reactant that is catalyzed by an enzyme