`NADH^(+)H^(+)` is utilized in this reaction during alcoholic fermentation

Options

A. Conversion of Pyruvic acid to Acetaldehyde
B. Conversion of GAP to Bisphosphoglyceric acid
C. Conversion of Acetaldehyde to Ethyl alcohol
D. Conversion of Pyruvic acid to Acetyl CO-A

Answer

### Step-by-Step Solution:

1. **Understanding Alcoholic Fermentation**:
- Alcoholic fermentation is a biological process where sugars are converted into cellular energy, producing ethanol and carbon dioxide as byproducts. This process is primarily carried out by yeast.

2. **Identifying the Role of NADH and H+**:
- During alcoholic fermentation, NADH (reduced form of NAD+) and H+ ions play a crucial role. NADH is generated during glycolysis when glucose is broken down into pyruvate.

3. **Analyzing the Reaction Steps**:
- The first step in alcoholic fermentation involves the conversion of pyruvate (the end product of glycolysis) into acetaldehyde. This step releases carbon dioxide.
- The next step is the conversion of acetaldehyde to ethanol (ethyl alcohol). This reaction is where NADH and H+ are utilized.

4. **Selecting the Correct Option**:
- From the options given:
- Option 1: Conversion of pyruvic acid to acetaldehyde (this step does not utilize NADH).
- Option 2: Conversion of G3P to bisphosphoglyceric acid (not related to alcoholic fermentation).
- Option 3: Conversion of acetaldehyde to ethyl alcohol (this step utilizes NADH and H+).
- Option 4: Conversion of pyruvic acid to acetyl CoA (this is part of aerobic respiration, not fermentation).
- The correct option is **Option 3: Conversion of acetaldehyde to ethyl alcohol**.

5. **Conclusion**:
- Therefore, the reaction during alcoholic fermentation that utilizes NADH and H+ is the conversion of acetaldehyde to ethyl alcohol.