Total energy obtained from 38 ATP is _____kJ.

Options

A. 1298
B. 1398
C. 1292
D. 1392

Answer

To find the total energy obtained from 38 ATP molecules, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Energy Released by One ATP**:
- The hydrolysis of one ATP molecule releases approximately 31 kJ of energy. This value is an average, as the actual energy can vary between 28 to 34 kJ depending on conditions.

2. **Calculate the Total Energy for 38 ATP**:
- To find the total energy released from 38 ATP molecules, we multiply the energy released by one ATP by the number of ATP molecules:
\[ \text{Total Energy} = \text{Energy per ATP} \times \text{Number of ATP} \]
\[ \text{Total Energy} = 31 \, \text{kJ} \times 38 \]

3. **Perform the Multiplication**:
- Now, calculate the multiplication:
\[ 31 \, \text{kJ} \times 38 = 1178 \, \text{kJ} \]

4. **Select the Closest Option**:
- The calculated energy (1178 kJ) needs to be compared with the given options: 1298 kJ, 1398 kJ, 1292 kJ, and 1392 kJ. The closest option to 1178 kJ is 1292 kJ.

5. **Conclusion**:
- Therefore, the total energy obtained from 38 ATP is approximately **1292 kJ**.