For many enzymes, the rate of product formation increases as the concentration of the substrate increases. Eventually the rate of the reaction reaches a maximum at which further increases in the concentration of the substrate have no effect. Why?
A) The enzyme is no longer specific for the substrate.
B) At high concentrations of substrate, the reaction is endergonic.
C) At high concentrations of substrate, the activation energy of the reaction increases.
D) At high concentrations of substrate, all of the enzyme active sites are being occupied by substrate molecules.
E) At high concentrations of substrate, the activation energy of the reaction decreases.

Question

Quizplus · Accepted Answer

At high concentrations of substrate, all of the enzyme active sites are occupied, leading to a maximum rate of reaction that cannot be increased by adding more substrate. This is known as enzyme saturation.

For Many Enzymes, the Rate of Product Formation Increases as the Concentration