Which of the following statements about enzyme-catalyzed reactions is true?
A)The free-energy change of the reaction is greater than when the same reaction occurs in the absence of an enzyme.
B)The rate of the reaction is greater than when the same reaction occurs in the absence of an enzyme.
C)The activation energy required for the reaction to proceed is greater than when the same reaction occurs in the absence of an enzyme.
D)Energy from ATP is required to activate the enzyme before it can catalyze the reaction.

Question

Quizplus · Accepted Answer

Enzymes lower the activation energy required for a reaction, leading to an increase in the reaction rate. Therefore, the rate of the reaction is greater with an enzyme compared to in the absence of an enzyme. The free-energy change of the reaction is not affected by the enzyme and can be either positive or negative. Energy from ATP is not required for enzyme activation.

Which of the Following Statements About Enzyme-Catalyzed Reactions Is True