Define activation energy and explain how enzymes affect it.

Define activation energy and explain how enzymes affect it.

• A. Activation energy is the minimum energy to start a reaction; enzymes lower it by stabilizing transition states, increasing rate.
• B. Activation energy is the final energy of products; enzymes lower it.
• C. Activation energy is the energy released by the reaction; enzymes have no effect.
• D. Activation energy is unrelated to reaction rate; enzymes speed up by increasing temperature.

Answer: (A)