What the net amount of ATP produced in an aerobic glycolysis process ?

Options

A. 2
B. 8
C. 12
D. 36

Answer

To determine the net amount of ATP produced in the process of aerobic glycolysis, we can break down the process step by step.

### Step-by-Step Solution:

1. **Understanding Glycolysis**: Glycolysis is the metabolic pathway that converts glucose into pyruvate, producing ATP and NADH in the process. It occurs in the cytoplasm of the cell.

2. **Initial Investment of ATP**:
- The first step involves the conversion of glucose to glucose-6-phosphate, which requires the investment of 1 ATP.
- The second step involves converting fructose-6-phosphate to fructose-1,6-bisphosphate, which requires another ATP.
- Therefore, a total of **2 ATP** are consumed in the initial steps of glycolysis.

3. **Splitting of Fructose-1,6-bisphosphate**:
- The fructose-1,6-bisphosphate is split into two molecules: glyceraldehyde-3-phosphate (G3P) and dihydroxyacetone phosphate (DHAP).
- DHAP is converted into G3P, resulting in **two molecules of G3P**.

4. **Production of ATP**:
- Each G3P molecule is converted into 1,3-bisphosphoglycerate, producing 2 NADH (1 from each G3P).
- The conversion of 1,3-bisphosphoglycerate to 3-phosphoglycerate produces 2 ATP (1 ATP from each G3P).
- The conversion of phosphoenolpyruvate (PEP) to pyruvate also produces 2 ATP (1 ATP from each G3P).
- Therefore, a total of **4 ATP** are produced from the conversion of G3P to pyruvate.

5. **Calculating Net ATP Production**:
- Total ATP produced: 4 ATP
- Total ATP consumed: 2 ATP
- Net ATP production = Total ATP produced - Total ATP consumed
- Net ATP = 4 ATP - 2 ATP = **2 ATP**.

### Conclusion:
The net amount of ATP produced in the process of aerobic glycolysis is **2 ATP**.