Q.) Acetyl CoA is produced from pyruvate by

Options

A. a) oxidative decarboxylation
B. b) oxidative photophosphorylation
C. oxidative hydrogenation
D. d) oxidative photorespiration

Answer

To solve the question "Acetyl CoA is produced from pyruvate by", we will analyze the options provided and identify the correct process involved in the conversion of pyruvate to acetyl CoA.

### Step-by-Step Solution:

1. **Understanding the Process**:
- Pyruvate is a key intermediate in cellular metabolism, particularly in the conversion of glucose to energy.
- The conversion of pyruvate to acetyl CoA is an important step that occurs before the citric acid cycle (Krebs cycle).

2. **Identifying the Correct Option**:
- **Option A: Oxidative Decarboxylation**: This process involves the removal of a carboxyl group from a molecule, releasing carbon dioxide (CO2). In the case of pyruvate, it is converted to acetyl CoA by removing a CO2 molecule.
- **Option B: Oxidative Photophosphorylation**: This process is related to the formation of ATP in photosynthesis and does not involve the conversion of pyruvate.
- **Option C: Oxidative Hydrogenation**: This term typically refers to the addition of hydrogen to a molecule, which is not relevant in the conversion of pyruvate to acetyl CoA.
- **Option D: Oxidative Photorespiration**: This process involves the use of ATP and NADH and is not related to the conversion of pyruvate.

3. **Conclusion**:
- Since the conversion of pyruvate to acetyl CoA involves the release of CO2, it is classified as oxidative decarboxylation. Therefore, the correct answer is **Option A: Oxidative Decarboxylation**.

### Final Answer:
Acetyl CoA is produced from pyruvate by **oxidative decarboxylation**.

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