MDCAT Chemistry MCQ #4884

Biochemical reactions in the human body occur rapidly at 37°C. By what mechanism do enzymes allow these reactions to proceed at such low temperatures?

MDCAT Chemistry MCQ #4884

  1. Question 1

    Q1. Biochemical reactions in the human body occur rapidly at 37°C. By what mechanism do enzymes allow these reactions to proceed at such low temperatures?

    • A) Increasing kinetic energy
    • B) Raising the temperature
    • C) Lowering activation energy
    • D) Increasing reactant concentration

    Answer: Lowering activation energy

    Explanation: Enzymes lower the activation energy by stabilizing the transition state. Increasing total energy is tempting but enzymes only manipulate the barrier height.