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nmdcat.online June 27, 2026

The principal reason that enzymes are essential for life processes is their extraordinary ability to

A. Be consumed in a reaction to produce heat
B. Significantly lower the activation energy of biochemical reactions
✓
C. Shift the equilibrium of a reaction to favor product formation
D. Change the free energy change (ΔG) of an endergonic reaction

📝 Explanation

Enzymes, like all catalysts, speed up the rate of a reaction by providing an alternative pathway with a lower activation energy (Ea). They do not change the overall free energy change (ΔG) or the equilibrium constant of the reaction. Without this rate enhancement, metabolic reactions would be too slow to sustain life.

📖 Additional Information

  • Be consumed in a reaction to produce heat
  • Significantly lower the activation energy of biochemical reactions
  • Shift the equilibrium of a reaction to favor product formation
  • Change the free energy change (ΔG) of an endergonic reaction

Enzymes, like all catalysts, speed up the rate of a reaction by providing an alternative pathway with a lower activation energy (Ea). They do not change the overall free energy change (ΔG) or the equilibrium constant of the reaction. Without this rate enhancement, metabolic reactions would be too slow to sustain life.

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