How do enzymes affect activation energy?

How do enzymes affect activation energy?

• A. They increase activation energy
• B. They alter final products
• C. They change the overall chemical equation
• D. They lower activation energy required for the reaction

Answer: (D)

Enzymes lower the energy barrier that must be overcome for a reaction to proceed. They do this by providing an active site where substrates fit precisely, bringing them into the correct orientation and proximity, and stabilizing the transition state with specific interactions from amino acids, cofactors, or the surrounding environment. This combination of binding, orientation, and stabilization reduces the activation energy needed, so the reaction runs faster. Importantly, enzymes do not change the final products or the overall chemical equation, and they are not consumed in the reaction.

Enzymes lower the energy barrier that must be overcome for a reaction to proceed. They do this by providing an active site where substrates fit precisely, bringing them into the correct orientation and proximity, and stabilizing the transition state with specific interactions from amino acids, cofactors, or the surrounding environment. This combination of binding, orientation, and stabilization reduces the activation energy needed, so the reaction runs faster. Importantly, enzymes do not change the final products or the overall chemical equation, and they are not consumed in the reaction.