Which graph shows changes in the rate of an enzyme-catalyzed reaction as substrate concentration is varied?

Question

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Graph B shows a classic Michaelis-Menten curve, which describes changes in the rate of an enzyme-catalyzed reaction as substrate concentration is varied. The initial rate of the reaction increases as substrate concentration increases until it reaches a maximum velocity (Vmax) when all the enzyme active sites are saturated with substrate. At higher concentrations, the rate of the reaction plateau as there are no active sites left to bind substrate.

Which Graph Shows Changes in the Rate of an Enzyme-Catalyzed