Net ATP production from fermentation of one glucose molecule is

Options

A. 3ATP
B. 2ATP
C. 4ATP
D. 1ATP

Answer

To determine the net ATP production from the fermentation of one glucose molecule, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Fermentation**:
- Fermentation is an anaerobic process that occurs in the absence of oxygen. It allows cells to convert glucose into energy without using the electron transport chain.

2. **Glycolysis**:
- The first step in both aerobic and anaerobic respiration is glycolysis. During glycolysis, one molecule of glucose (6 carbons) is broken down into two molecules of pyruvate (3 carbons).
- This process produces a net gain of 2 ATP molecules and 2 NADH molecules.

3. **Pathway of Pyruvate in Fermentation**:
- In the absence of oxygen, pyruvate does not enter the citric acid cycle. Instead, it undergoes fermentation.
- In alcoholic fermentation (common in yeast), pyruvate is converted to ethanol and carbon dioxide.

4. **ATP Yield from Fermentation**:
- The fermentation process itself does not produce additional ATP beyond what is generated during glycolysis. Therefore, the total ATP yield from the fermentation of one glucose molecule is the same as the ATP produced in glycolysis.
- Thus, the net ATP production from fermentation of one glucose molecule is 2 ATP.

5. **Conclusion**:
- The net ATP production from the fermentation of one glucose molecule is 2 ATP.

### Final Answer:
The net ATP production from fermentation of one glucose molecule is **2 ATP**.

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