The initial velocity of an enzyme-catalyzed reaction is followed at various substrate concentrations.At very high substrate concentrations it is observed that the initial velocity no longer increases as more substrate is added.The velocity under these conditions is known as A) the ultimate velocity. B) the maximum velocity. C) v_[S]. D) optimal velocity.

Question

Quizplus · Accepted Answer

At very high substrate concentrations, the active sites of the enzymes become saturated with substrate molecules, and the rate of reaction cannot be increased any further. The velocity under these conditions is known as the maximum velocity (Vmax), which is a characteristic property of the enzyme-catalyzed reaction. Therefore, the best choice is B.

The Initial Velocity of an Enzyme-Catalyzed Reaction Is Followed at Various