**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 CouplingConsider 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 OptionsThe 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**### ExplanationIn 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.

The reactant is lactic acid and the product is pyruvic acid.

Answered: OH OH 0₂ OH Which reaction below is…

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

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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