Question

which of the following is false about the structure of enzymes? a every enzyme has an active site. b an enzyme can catalyze most reactions if the reactants are at a high concentration. c an enzymes active site is determined by the shape of the enzyme. d enzymes speed up reaction rates.

Explanation:

Enzymes are highly specific in the reactions they catalyze. An enzyme's activity is not mainly determined by high - reactant concentration but by factors like the fit between the substrate and the active site. Each enzyme has an active site (A is true), enzymes speed up reaction rates (D is true), and the active - site shape is crucial (C is true). But an enzyme cannot catalyze most reactions regardless of reactant concentration as it is specific to certain substrates and reactions.

Answer:

C. An enzyme can catalyze most reactions if the reactants are at a high concentration.