Multiple Choice
What happens to enzymes after the reaction they catalyze is complete?
31. Catalysis in Organic Reactions
Introduction to Catalysis
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Enzymes act as catalysts in biochemical reactions. What does this mean?
A
They are consumed in the reaction and need to be replenished.
B
They increase the activation energy required for the reaction.
C
They change the equilibrium position of the reaction.
D
They lower the activation energy, speeding up the reaction without being consumed.
Verified step by step guidance1
Understand the role of enzymes: Enzymes are biological catalysts that speed up chemical reactions in living organisms.
Recognize that catalysts, including enzymes, are not consumed in the reaction. They facilitate the reaction but remain unchanged after the reaction is complete.
Identify the effect of enzymes on activation energy: Enzymes lower the activation energy required for a reaction, making it easier for the reaction to occur.
Clarify that enzymes do not change the equilibrium position of a reaction. They only speed up the rate at which equilibrium is reached.
Conclude that the correct statement about enzymes is that they lower the activation energy, thereby speeding up the reaction without being consumed.
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