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OH OH 0₂ OH Which reaction below is likely coupled to the above reaction? ATP --> ADP ADP --> ATP OCOA-SH --> COA NAD+ --> NADH CoQ10 --> CoQ10H₂

OH OH 0₂ OH Which reaction below is likely coupled to the above reaction? ATP --> ADP ADP --> ATP OCOA-SH --> COA NAD+ --> NADH CoQ10 --> CoQ10H₂

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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**Understanding Coupled Reactions in Biochemistry** In biochemical pathways, reactions often occur in pairs, known as coupled reactions. This is fundamental to understanding how cells harness and utilize energy. ### Example Reaction and Coupling Consider the chemical reaction shown in the image, where a molecule undergoes oxidation in the presence of oxygen (O₂) to form a different molecule: \[ \text{Reactant} \rightarrow \text{Product} \] This reaction is identified by the transformation of a carboxylic acid group (indicated by the COOH group) which is a common reaction in metabolic pathways involving redox reactions. ### Coupled Reaction Options The image provides multiple-choice options to identify which reaction is most likely to be coupled with the above reaction: 1. **ATP --> ADP** 2. **ADP --> ATP** 3. **CoA-SH --> CoA** 4. **NAD⁺ --> NADH** 5. **CoQ₁₀ --> CoQ₁₀H₂** ### Explanation In biochemical systems, coupling often involves redox pairs or phosphorylation/dephosphorylation events to maintain energy balance and facilitate necessary cellular processes. For example: - **NAD⁺ --> NADH** This indicates the reduction of NAD⁺ to NADH, which typically couples with oxidation reactions, making it a probable match. - **ATP --> ADP** This indicates the release of energy, often coupled with processes that require energy. Given the reactant is oxidized, the reduction of NAD⁺ to NADH is most likely coupled to balance the redox reaction. **Conclusion:** The most likely reaction to be coupled with the above oxidative reaction is: \[ \mathbf{NAD^+ \rightarrow NADH} \] This coupling ensures that the redox balance is maintained during the cellular metabolic processes. Understanding these reactions helps provide insight into how cells efficiently manage energy and biochemical transformations. --- This content is intended for educational purposes, providing an understanding of reaction coupling in biochemical pathways.
Transcribed Image Text:**Understanding Coupled Reactions in Biochemistry** In biochemical pathways, reactions often occur in pairs, known as coupled reactions. This is fundamental to understanding how cells harness and utilize energy. ### Example Reaction and Coupling Consider the chemical reaction shown in the image, where a molecule undergoes oxidation in the presence of oxygen (O₂) to form a different molecule: \[ \text{Reactant} \rightarrow \text{Product} \] This reaction is identified by the transformation of a carboxylic acid group (indicated by the COOH group) which is a common reaction in metabolic pathways involving redox reactions. ### Coupled Reaction Options The image provides multiple-choice options to identify which reaction is most likely to be coupled with the above reaction: 1. **ATP --> ADP** 2. **ADP --> ATP** 3. **CoA-SH --> CoA** 4. **NAD⁺ --> NADH** 5. **CoQ₁₀ --> CoQ₁₀H₂** ### Explanation In biochemical systems, coupling often involves redox pairs or phosphorylation/dephosphorylation events to maintain energy balance and facilitate necessary cellular processes. For example: - **NAD⁺ --> NADH** This indicates the reduction of NAD⁺ to NADH, which typically couples with oxidation reactions, making it a probable match. - **ATP --> ADP** This indicates the release of energy, often coupled with processes that require energy. Given the reactant is oxidized, the reduction of NAD⁺ to NADH is most likely coupled to balance the redox reaction. **Conclusion:** The most likely reaction to be coupled with the above oxidative reaction is: \[ \mathbf{NAD^+ \rightarrow NADH} \] This coupling ensures that the redox balance is maintained during the cellular metabolic processes. Understanding these reactions helps provide insight into how cells efficiently manage energy and biochemical transformations. --- This content is intended for educational purposes, providing an understanding of reaction coupling in biochemical pathways.
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