How many PGAL are produced by glycolysis of three molecules of glucose ? How many ATP are released by respiration of these PGAL till formation of `CO_(2)" and "H_(2)O`

Options

A. 4 PGAL-40 ATP
B. 6 PGAL-120 ATP
C. 4 PGAL-80 ATP
D. 5 PGAL-160 ATP

Answer

To solve the question step by step, we will break down the process of glycolysis and the subsequent ATP production from the resulting PGAL (Phosphoglyceraldehyde) molecules.

### Step 1: Determine PGAL Production from Glucose
1. **Understand Glycolysis**: Glycolysis is the metabolic pathway that converts glucose into pyruvate, producing PGAL as an intermediate.
2. **PGAL Production**: Each molecule of glucose produces 2 molecules of PGAL during glycolysis.
3. **Calculate for Three Glucose Molecules**: If one molecule of glucose produces 2 PGAL, then three molecules of glucose will produce:
\[ 3 \text{ glucose} \times 2 \text{ PGAL/glucose} = 6 \text{ PGAL} \]

### Step 2: Determine ATP Production from PGAL
1. **ATP Yield from PGAL**: The complete oxidation of PGAL through cellular respiration (including glycolysis, the Krebs cycle, and oxidative phosphorylation) yields a total of approximately 38 ATP per molecule of glucose.
2. **Relate PGAL to ATP**: Since 2 PGAL are produced from 1 glucose, we can deduce that:
- 2 PGAL yield 38 ATP.
- Therefore, 1 PGAL yields:
\[ \frac{38 \text{ ATP}}{2 \text{ PGAL}} = 19 \text{ ATP/PGAL} \]
3. **Calculate for 6 PGAL**: Now, for 6 PGAL, the total ATP produced would be:
\[ 6 \text{ PGAL} \times 19 \text{ ATP/PGAL} = 114 \text{ ATP} \]

### Conclusion
- **Total PGAL Produced**: 6 PGAL from the glycolysis of three glucose molecules.
- **Total ATP Released**: 114 ATP from the respiration of these 6 PGAL until the formation of CO₂ and H₂O.

### Final Answer:
- **PGAL Produced**: 6
- **ATP Released**: 114