Rate of an Enzyme-Catalyzed Reaction as a Function of Varying

question 41

Multiple Choice

Rate of an enzyme-catalyzed reaction as a function of varying reactant
Concentration, with the concentration of enzyme constant.
In the accompanying figure, why does the reaction rate plateau at higher reactant concentrations?

• A) Feedback inhibition by product occurs at high reactant concentrations.
• B) Most enzyme molecules are occupied by substrate at high reactant concentrations.
• C) The reaction nears equilibrium at high reactant concentrations.
• D) The activation energy for the reaction increases with reactant concentration.
• E) The rate of the reverse reaction increases with reactant concentration.

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