Multiple Choice
In a reaction coordinate diagram showing free energy versus reaction progress, which curve represents the reaction pathway in the presence of an enzyme?
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6. Enzymes and Enzyme Kinetics
Activation Energy
Multiple Choice
Which of the following statements is false with respect to an enzyme's ability to catalyze a reaction?
A
An enzyme provides a reaction surface & suitable environment for a reaction to take place.
B
An enzyme binds substrates to position them correctly & allow them to attain transition state configurations.
C
An enzyme allows a reaction to go through a less stable transition state than normal.
D
a & c are false.
Verified step by step guidance1
Understand the role of enzymes: Enzymes are biological catalysts that speed up chemical reactions by lowering the activation energy required for the reaction to proceed.
Identify the true statements: Enzymes provide a reaction surface and suitable environment, and they bind substrates to position them correctly, facilitating the attainment of transition state configurations.
Analyze the false statement: The statement 'An enzyme allows a reaction to go through a less stable transition state than normal' is false because enzymes stabilize the transition state, making it more stable, not less.
Evaluate the options: Option 'a' is true as enzymes do provide a reaction surface and environment. Option 'c' is false as explained, enzymes stabilize the transition state.
Conclude which statements are false: Based on the analysis, only statement 'c' is false, not 'a'. Therefore, the assertion that both 'a' and 'c' are false is incorrect.
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