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The figure illustrates the energy states associated with the reaction A + B ↔ C + D. Which of the following represents the activation energy required for the enzyme-catalyzed reaction in the figure?
A) a
B) b
C) c
D) d

Question

Use the following information to answer the question below.

The figure illustrates the energy states associated with the reaction A + B ↔ C + D. Which of the following represents the activation energy required for the enzyme-catalyzed reaction in the figure?
A) a 
B) b 
C) c 
D) d

Quizplus · Accepted Answer

The activation energy is the energy difference between the reactants and the transition state. In the figure, the energy required for the enzyme-catalyzed reaction is represented by the energy barrier between the reactants and the transition state. Option B shows the highest energy barrier and thus represents the activation energy required for the enzyme-catalyzed reaction. Options A, C, and D do not show the appropriate energy barrier for the activation energy.

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