### Understanding Reaction Energy Diagrams#### Graph Explanation:This diagram displays the energy states involved in the chemical reaction \( A + B \to C + D \). It plots **Free Energy** on the y-axis against the **Progress of the Reaction** on the x-axis.- **Initial State (A + B):** The reaction starts with reactants A and B having a certain free energy level. - **Energy Barrier:** The curve then rises to a peak, indicating the transition state. This peak is critical as it represents the **activation energy** needed to initiate the reaction.- **Final State (C + D):** The curve descends to a lower energy level where products C and D are formed, showing the energy release in the reaction. #### Energy Labels:- **a:** Represents the total energy change from reactants to the peak energy of the transition state.- **b:** Represents the energy difference from the transition state to the final energy level of C + D.- **c:** Measures the overall energy difference between reactants A + B and products C + D.- **d:** Indicates the energy release from the peak energy of the transition state to the reactants' energy level.- **e:** Represents the energy difference from the initial level of A + B to the final level of C + D.#### Question:Which of the following represents the activation energy required for the enzyme-catalyzed reaction in the figure?- A) a - B) b - C) c - D) d The correct answer is **A) a**, which denotes the activation energy needed to reach the transition state from the reactants' initial energy level.

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Question

### Understanding Reaction Energy Diagrams

#### Graph Explanation:
This diagram displays the energy states involved in the chemical reaction \( A + B \to C + D \). It plots **Free Energy** on the y-axis against the **Progress of the Reaction** on the x-axis.

- **Initial State (A + B):** The reaction starts with reactants A and B having a certain free energy level.
- **Energy Barrier:** The curve then rises to a peak, indicating the transition state. This peak is critical as it represents the **activation energy** needed to initiate the reaction.
- **Final State (C + D):** The curve descends to a lower energy level where products C and D are formed, showing the energy release in the reaction.

#### Energy Labels:
- **a:** Represents the total energy change from reactants to the peak energy of the transition state.
- **b:** Represents the energy difference from the transition state to the final energy level of C + D.
- **c:** Measures the overall energy difference between reactants A + B and products C + D.
- **d:** Indicates the energy release from the peak energy of the transition state to the reactants' energy level.
- **e:** Represents the energy difference from the initial level of A + B to the final level of C + D.

#### Question:
Which of the following represents the activation energy required for the enzyme-catalyzed reaction in the figure?

- A) a
- B) b
- C) c
- D) d

The correct answer is **A) a**, which denotes the activation energy needed to reach the transition state from the reactants' initial energy level.

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