Question

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

Explanation:

Enzymes are biological catalysts. The reactant that binds to the active site (the region where the reaction occurs) of an enzyme is called a substrate. A product is what is formed after the reaction. Concentration refers to the amount of a substance in a given volume. An object is a very general and non - scientific term in this context.

Answer:

B. a substrate