Question

multiple - choice question
in a catalyzed reaction, what is a substrate?
□ a reactant
□ peanut butter
□ the product
□ a cofactor
□ an intermediate

Explanation:

In a catalyzed reaction, a substrate is the reactant that binds to the catalyst (such as an enzyme). It is the starting - material that gets converted into products. Peanut butter is not relevant in this context. The product is what the substrate is converted into, not the substrate itself. A cofactor is a non - protein component that helps an enzyme (catalyst) function. An intermediate is a short - lived species formed during the reaction pathway between the substrate and the product.

Answer:

a reactant