How many ATP molecules could maximally be generated from one molecule of glucose, if the complete oxidation of one mole of glucose to `CO_(2)` and `H_(2)O` yields 686 kcal and the useful chemical energy available in the high energy phosphate bond of one mole of ATP is 12 kcal

Options

A. Fifty-seven
B. One
C. Two
D. Thirty

Answer

To determine how many ATP molecules can be generated from one molecule of glucose, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the total energy released from glucose oxidation**:
- The complete oxidation of one mole of glucose yields 686 kcal.

2. **Identify the energy available in one mole of ATP**:
- The useful chemical energy available in the high-energy phosphate bond of one mole of ATP is 12 kcal.

3. **Calculate the number of ATP molecules generated**:
- To find out how many ATP molecules can be generated from the energy released by the oxidation of glucose, we divide the total energy from glucose by the energy per ATP molecule.
- Formula:
\[ \text{Number of ATP} = \frac{\text{Total energy from glucose}}{\text{Energy per ATP}} \]
- Substituting the values:
\[ \text{Number of ATP} = \frac{686 \text{ kcal}}{12 \text{ kcal/ATP}} \approx 57.17 \]

4. **Round to the nearest whole number**:
- Since we cannot have a fraction of an ATP molecule, we round 57.17 to 57 ATP molecules.

5. **Conclusion**:
- Therefore, the maximum number of ATP molecules that can be generated from one molecule of glucose is approximately 57.

### Final Answer:
**57 ATP molecules**

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