Multiple Choice
What happens to the enzyme pepsin when it is boiled?
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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
Which of the following best describes the effect of enzymes on chemical reactions?
A
Enzymes permanently alter the equilibrium position of a reaction.
B
Enzymes lower the activation energy of reactions, increasing the reaction rate.
C
Enzymes increase the free energy change (\(\Delta G\)) of a reaction.
D
Enzymes 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 reactions without being consumed in the process. They achieve this by lowering the activation energy required for the reaction to proceed.
Clarify the concept of activation energy: Activation energy is the minimum energy required for reactants to transform into products. Enzymes provide an alternative pathway with a lower activation energy, making the reaction faster.
Examine the equilibrium position: Enzymes do not permanently alter the equilibrium position of a reaction. They only help the reaction reach equilibrium faster by increasing the rate of both the forward and reverse reactions.
Discuss the free energy change (
): Enzymes do not affect the free energy change of a reaction. The value of
remains the same whether or not an enzyme is present.
Address enzyme reuse: Enzymes are not consumed during the reaction. They remain unchanged after facilitating the reaction and can be reused multiple times for the same type of reaction.
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