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38. The shown reaction is one of the four repeating steps during fatty acid biosynthesis. Which of the following statements is correct? CH3-C-CH₂-C-S-ACP H₂-E-CH₂_i A B 圆 OH CH3-C-CH₂-C-5-ACP A. The small molecule in box A is NADPH + H+ B. It is the second reduction reaction during fatty acid biosynthesis C. Both A and B D. Neither A nor B

38. The shown reaction is one of the four repeating steps during fatty acid biosynthesis. Which of the following statements is correct? CH3-C-CH₂-C-S-ACP H₂-E-CH₂_i A B 圆 OH CH3-C-CH₂-C-5-ACP A. The small molecule in box A is NADPH + H+ B. It is the second reduction reaction during fatty acid biosynthesis C. Both A and B D. Neither A nor B

Biochemistry
Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
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### Fatty Acid Biosynthesis Reaction **Question 38:** The shown reaction is one of the four repeating steps during fatty acid biosynthesis. Which of the following statements is correct? The chemical reaction can be summarized as follows: \[ \text{CH}_3\text{-C(=O)-CH}_2\text{-C(=O)-S-ACP} \xrightarrow{\text{A}} \text{CH}_3\text{-C(=O)-CH}_2\text{-C(OH)-S-ACP} \] **Options:** A. The small molecule in box A is NADPH + H\(^+\) B. It is the second reduction reaction during fatty acid biosynthesis C. Both A and B D. Neither A nor B **Explanation of the Reaction:** - On the left, the molecule is CH\(_3\)-C(=O)-CH\(_2\)-C(=O)-S-ACP, indicating an acyl carrier protein (ACP) linked fatty acyl intermediate. - On the right, the product of the reaction is CH\(_3\)-C(=O)-CH\(_2\)-C(OH)-S-ACP, suggesting the conversion of the double-bonded oxygen (=O) on the beta-carbon to a hydroxyl group (-OH). Boxes A and B indicate reactants or intermediates involved in this conversion. **Graphical Explanation:** 1. **Reactant (Left):** CH\(_3\)-C(=O)-CH\(_2\)-C(=O)-S-ACP 2. **Conversion Process:** - A signifies the reactant involved in the reduction process (likely NADPH + H\(^+\)). - B signifies the intermediate or final product after the reaction. 3. **Product (Right):** CH\(_3\)-C(=O)-CH\(_2\)-C(OH)-S-ACP **Correct Answer Explanation:** The correct answer to the question is: - **A:** The small molecule in box A is NADPH + H\(^+\). This is correct because this molecule provides the reducing equivalents in fatty acid biosynthesis. - **B:** It is the second reduction reaction during fatty acid biosynthesis. This statement is also correct as it represents the conversion of a ketone to a hydroxyl group. Therefore,
Transcribed Image Text:### Fatty Acid Biosynthesis Reaction **Question 38:** The shown reaction is one of the four repeating steps during fatty acid biosynthesis. Which of the following statements is correct? The chemical reaction can be summarized as follows: \[ \text{CH}_3\text{-C(=O)-CH}_2\text{-C(=O)-S-ACP} \xrightarrow{\text{A}} \text{CH}_3\text{-C(=O)-CH}_2\text{-C(OH)-S-ACP} \] **Options:** A. The small molecule in box A is NADPH + H\(^+\) B. It is the second reduction reaction during fatty acid biosynthesis C. Both A and B D. Neither A nor B **Explanation of the Reaction:** - On the left, the molecule is CH\(_3\)-C(=O)-CH\(_2\)-C(=O)-S-ACP, indicating an acyl carrier protein (ACP) linked fatty acyl intermediate. - On the right, the product of the reaction is CH\(_3\)-C(=O)-CH\(_2\)-C(OH)-S-ACP, suggesting the conversion of the double-bonded oxygen (=O) on the beta-carbon to a hydroxyl group (-OH). Boxes A and B indicate reactants or intermediates involved in this conversion. **Graphical Explanation:** 1. **Reactant (Left):** CH\(_3\)-C(=O)-CH\(_2\)-C(=O)-S-ACP 2. **Conversion Process:** - A signifies the reactant involved in the reduction process (likely NADPH + H\(^+\)). - B signifies the intermediate or final product after the reaction. 3. **Product (Right):** CH\(_3\)-C(=O)-CH\(_2\)-C(OH)-S-ACP **Correct Answer Explanation:** The correct answer to the question is: - **A:** The small molecule in box A is NADPH + H\(^+\). This is correct because this molecule provides the reducing equivalents in fatty acid biosynthesis. - **B:** It is the second reduction reaction during fatty acid biosynthesis. This statement is also correct as it represents the conversion of a ketone to a hydroxyl group. Therefore,
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