Multiple Choice
Which of the following could not clearly be a contributor to general acid-base catalysis (circle all that apply)?
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6. Enzymes and Enzyme Kinetics
Catalysis
Multiple Choice
In the context of catalysis, how does an enzyme affect a chemical reaction?
A
It increases the activation energy so the reaction proceeds more slowly but reaches the same equilibrium position.
B
It changes the reaction equilibrium by increasing the Gibbs free energy change () so more products form at equilibrium.
C
It lowers the activation energy by stabilizing the transition state, increasing the reaction rate without changing the equilibrium constant.
D
It is consumed during the reaction, providing energy that drives the reaction to completion.
Verified step by step guidance1
Understand that enzymes are biological catalysts that speed up chemical reactions without being consumed in the process.
Recall that the activation energy (Ea) is the energy barrier that must be overcome for reactants to be converted into products.
Recognize that enzymes lower the activation energy by stabilizing the transition state, which is the high-energy intermediate between reactants and products.
Note that lowering the activation energy increases the reaction rate, allowing the reaction to proceed faster.
Remember that enzymes do not change the overall Gibbs free energy change (\$\(\Delta\) G\$) of the reaction, so the equilibrium position remains the same.
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