Consider an enzymatic reaction in which the initial concentration of substrate is low. If the amount of enzyme is held constant, but the amount of substrate is increased, the rate of an enzyme catalyzed reaction will

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Quizplus · Accepted Answer

At low substrate concentrations, the rate of the reaction is limited by the amount of substrate available. As the substrate concentration is increased, the rate of the reaction initially increases in a linear fashion, as more substrate is available for binding to the enzyme. Eventually, the reaction rate will reach a maximum when all enzyme molecules are saturated with substrate. At this point, the rate of the reaction will remain constant, even if more substrate is added, as the enzyme is the limiting factor.

Consider an Enzymatic Reaction in Which the Initial Concentration of Substrate