試題詳解

43. If the substrate concentration in an enzyme catalyzed reaction is equal to 0.5 Km, the initial reaction velocity will be _______.
(A) 0.25 Vmax
(B) 0.33 Vmax
(C) 0.50 Vmax
(D) 0.67 Vmax
(E) 0.75 Vmax