4.Which of the following descriptions about the Michaelis-Menten rate equation is incorrect? (A) Km measures the substrate concentration at which the reaction rate is Vmax/2 (B) kat is the turnover number that measures the catalytic process (C) The ratio of Kcat/Km is a convenient measure of enzyme efficiency (D)kcat=Vmax/KM (E) A competitive inhibitor increases the apparent KM.