In an experiment, a student mixed a substrate and an enzyme. which statement best explains the reaction? a)the enzyme binds to the active sites on the substrate. b)the substrate binds to the non-active sites of the enzyme. c)the substrate acts as a coenzyme that catalyzes the reaction. d)the enzyme and the substrate form an enzyme-substrate complex.

D) The enzyme and substrate form an enzyme-substrate complex

An enzyme is a protein molecule that acts as a catalyst in biological reactions. It does so by acting on a substrate which is specific to its shape. The substrate binds to the enzyme's active site, forming the enzyme-substrate complex. The reaction is then complete and the product detaches from the enzyme molecule. The enzyme is then free to act on other substrate molecules.

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