試題詳解

12. Which one of the following statements is true of enzyme catalysts?
(A) Their catalytic activity is independent of pH.
(B) They are generally equally active on D and L isomers of a given substrate.
(C)They can increase the equilibrium constant for a given reaction by a thousand fold or more.
(D) They can increase the reaction rate for a given reaction by a thousand fold or more.
(E) To be effective, they must be present at the same concentration as their substrate.