Multiple Choice
Why are enzymes necessary for the process of DNA replication?
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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 increases the overall free energy change (\( \Delta G \)) of the reaction.
C
It makes the reaction non-specific to substrates.
D
It permanently alters its own structure during 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 (
abla G) of the reaction.
Clarify the concept of activation energy: Activation energy is the energy barrier that must be overcome for reactants to be converted into products. Enzymes stabilize the transition state, reducing this energy barrier.
Evaluate the specificity of enzymes: 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' or 'induced fit' model.
Understand enzyme structure during reactions: Enzymes do not permanently alter their structure during a reaction. They return to their original state after facilitating the reaction, allowing them to be reused.
Compare the options provided: Based on the above concepts, identify the correct statement about enzymes. The correct answer is that enzymes lower the activation energy required for the reaction to proceed.
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