Which of the following is NOT a property of an enzyme? a. An...

Name: Problem 2, Chapter 6: Understanding Biology
Uploaded: 2021-09-22T17:57:50-08:00
Duration: 1 min 16 s
Channel: Joanna Quigley
Description: Which of the following is NOT a property of an enzyme? a. An enzyme reduces the activation energy of a reaction. b. An enzyme lowers the free energy of the reactants. c. An enzyme does not change as a result of the reaction. d. An enzyme works in both the forward and reverse directions of a reaction.

Which of the following is NOT a property of an enzyme? a. An enzyme reduces the activation energy of a reaction. b. An enzyme lowers the free energy of the reactants. c. An enzyme does not change as a result of the reaction. d. An enzyme works in both the forward and reverse directions of a reaction.

Which of the following is NOT a property of an enzyme?
a. An enzyme reduces the activation energy of a reaction.
b. An enzyme lowers the free energy of the reactants.
c. An enzyme does not change as a result of the reaction.
d. An enzyme works in both the forward and reverse directions of a reaction.

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Key Concepts

Enzyme Catalysis

Enzymes function as biological catalysts that accelerate chemical reactions without being consumed. They achieve this by lowering the activation energy required for the reaction to proceed, enhancing the reaction rate while leaving the overall equilibrium unchanged.

Activation Energy

Activation energy is the minimum energy that reacting molecules must possess for a reaction to occur. Enzymes lower this energy barrier, allowing reactions to take place faster and under milder conditions than would otherwise be possible.

Reaction Free Energy vs. Activation Energy

While enzymes reduce the activation energy needed to start a reaction, they do not affect the overall free energy change (delta G) between reactants and products. The inherent thermodynamic properties of the reaction remain the same, meaning that enzymes do not lower the free energy of the reactants.

Reversibility of Enzyme-Catalyzed Reactions

Enzymes are capable of catalyzing reactions in both the forward and reverse directions, depending on the concentrations of substrates and products. This bidirectional activity reflects the fact that enzymatic reactions are governed by the same equilibrium principles as non-catalyzed reactions.

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