alleryStart learning →What is the substrate of an enzyme?
AThe chemical reactant to which the enzyme binds
BThe region of the enzyme that binds the reactant
CThe inorganic ion the enzyme needs to function
DThe product left after the reaction is complete
Answer & Solution
Correct answer: A. The chemical reactant to which the enzyme binds
1. The chemical reactants to which an enzyme binds are the enzyme's substrates.
2. There may be one or more substrates depending on the reaction.
3. The location within the enzyme where the substrate binds is the active site, which is what the second option describes.
4. Inorganic ions that enzymes need are cofactors, a separate category of helper molecule.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 6 "Metabolism", section 6.5 Enzymes_
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