Multiple Choice
Why can proteins act as excellent catalysts of chemical reactions in the body?
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6. Enzymes and Enzyme Kinetics
Enzymes
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
What effect do enzymes have on chemical reactions?
A
They increase the overall free energy change (\( \Delta G \)) of the reaction.
B
They lower the activation energy required for the reaction to proceed.
C
They make non-spontaneous reactions spontaneous by providing energy.
D
They are consumed during the reaction and cannot be reused.
Verified step by step guidance1
Understand the role of enzymes in chemical reactions: Enzymes are biological catalysts that speed up chemical reactions without being consumed in the process.
Clarify the concept of activation energy: Activation energy is the minimum energy required for reactants to transform into products. Enzymes lower this energy barrier, making it easier for the reaction to proceed.
Explain the relationship between enzymes and free energy change (
): Enzymes do not alter the overall free energy change of a reaction. They only affect the rate at which equilibrium is reached.
Address the misconception about spontaneity: Enzymes cannot make non-spontaneous reactions spontaneous. They only facilitate reactions that are thermodynamically favorable.
Highlight enzyme reusability: Enzymes are not consumed during the reaction. They remain unchanged and can be reused for subsequent reactions.
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