Multiple Choice
Where are most digestive enzymes produced in the human 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 does an enzyme have on a chemical reaction?
A
It lowers the activation energy required for the reaction to proceed.
B
It makes the reaction non-specific to substrates.
C
It increases the overall free energy change (\( \Delta G \)) of the reaction.
D
It permanently alters the enzyme's structure after the reaction.
Verified step by step guidance1
Understand the role of enzymes in chemical reactions: Enzymes are biological catalysts that speed up reactions by lowering the activation energy required for the reaction to proceed. They do not change the overall free energy change (
) of the reaction.
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 occur.
Examine substrate specificity: Enzymes are highly specific to their substrates due to the precise fit between the enzyme's active site and the substrate, often described as a 'lock and key' model. They do not make the reaction non-specific to substrates.
Discuss enzyme structure: Enzymes are not permanently altered after the reaction. They return to their original state and can be reused for subsequent reactions.
Summarize the correct effect: The correct answer is that enzymes lower the activation energy required for the reaction to proceed, facilitating faster reaction rates without altering the enzyme's structure or the overall free energy change (
).
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