Which of the following defines the kinetics of a reaction when every enzyme molecule in the reaction mixture has its substrate-binding site occupied by substrate? A)The kinetics become zero order and the velocity is V_max/2. B)The kinetics become zero order and the velocity is V_max. C)The kinetics become first order and the velocity is V_max/2. D)The kinetics become first order and the velocity isV_max.

Question

Quizplus · Accepted Answer

When every enzyme molecule in the reaction mixture has its substrate-binding site occupied by substrate, the kinetics become zero order, meaning that the rate of the reaction is independent of the concentration of substrate. The velocity of the reaction is given by the maximum velocity (Vmax) multiplied by the concentration of substrate (S) divided by the Michaelis constant (Km) plus the concentration of substrate. Therefore, the correct formula for the velocity of the reaction in this scenario is V_max.

Which of the Following Defines the Kinetics of a Reaction