MCAT Biochemistry Question 20: Answer and Explanation

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Test Information

Question: 20

5. Enzymes increase the rate of a reaction by:

  • A. decreasing the activation energy.
  • B. increasing the overall free energy change of the reaction.
  • C. increasing the activation energy.
  • D. decreasing the overall free energy change of the reaction.

Correct Answer: A

Explanation:

Enzymes increase the rate of a reaction by decreasing the activation energy. They do not affect the overall free energy, ΔG, of the reaction.

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