Question

question 7
the active site of an enzyme is the region that ...
binds allosteric regulators of the enzyme.
binds substrates for the enzyme.
binds noncompetitive inhibitors of the enzyme.
is inhibited by the presence of a coenzyme or a cofactor.

Explanation:

The active - site of an enzyme is the specific region where the substrate binds to the enzyme to form an enzyme - substrate complex, facilitating the chemical reaction. Allosteric regulators bind to allosteric sites, non - competitive inhibitors bind to sites other than the active site, and coenzymes/cofactors usually assist the enzyme but do not inhibit the active site.

Answer:

binds substrates for the enzyme.