試題詳解

6. Which of the following statements about acid and base catalysis is correct?
(A) Glu normally acts as a general acid in an enzyme reaction at around neutral pH.
(B) General acid can abstract a proton from a substrate.
(C) The active-site His in chymotrypsin protease reaction plays both roles of general acid and general base.
(D) The value of Cys side chain is around 6.
(E) Metal ion such as can accept electrons to act as a Lewis base.