In alcoholic fermentation, `NAD^(+)` is produced during the

Options

A. reduction of acetyldehyde to ethanol.
B. oxidation of glucose.
C. oxidation of glucose.
D. hydrolysis of ATP to ADP.

Explanation

To solve the question regarding the production of NAD⁺ during alcoholic fermentation, we can break it down into the following steps:

### Step-by-Step Solution:

1. **Understanding Glycolysis**:
- The process of alcoholic fermentation begins with glycolysis, where glucose is converted into pyruvate. During glycolysis, NAD⁺ is reduced to NADH.

2. **Formation of Acetaldehyde**:
- After glycolysis, the pyruvate produced is then converted into acetaldehyde. This step does not involve the production of NAD⁺.

3. **Reduction of Acetaldehyde to Ethanol**:
- The key step in alcoholic fermentation where NAD⁺ is produced occurs when acetaldehyde is reduced to ethanol. During this reduction, NADH (produced in glycolysis) is oxidized back to NAD⁺.

4. **Conclusion**:
- Therefore, in alcoholic fermentation, NAD⁺ is produced during the reduction of acetaldehyde to ethanol.

### Final Answer:
NAD⁺ is produced during the reduction of acetaldehyde to ethanol in alcoholic fermentation.

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