SAT Subject Biology Practice Question 195: Answer and Explanation

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Question: 195

5. How do enzymes help to carry out biochemical reactions?

A. By decreasing the energy of the reactants
B. By increasing the activation energy of the reaction
C. By decreasing the activation energy of the reaction
D. By increasing the energy of the products of the reaction
E. By decreasing the energy of the products of the reaction

Correct Answer: C

Explanation:

Enzymes decrease the activation energy required for a chemical reaction to take place, allowing a reaction to proceed without a large energy input and thereby greatly increasing the reaction rate.

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