How many electrons and ATP are required for synthesis of 4 molecules of ammonia in `N_(2)` fixation metabolism?

Options

A. 8 and 16 respectively
B. 32 and 16 respectively
C. 16 and 32 respectively
D. 4 and 8 respectively

Answer

To determine how many electrons and ATP are required for the synthesis of 4 molecules of ammonia in nitrogen fixation metabolism, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Reaction for Nitrogen Fixation**:
- The process of nitrogen fixation converts atmospheric nitrogen (N₂) into ammonia (NH₃). This process requires a certain number of electrons and ATP.

2. **Identify the Requirements for 2 Molecules of Ammonia**:
- According to the information provided, the synthesis of 2 molecules of ammonia requires:
- 8 electrons
- 16 ATP molecules

3. **Calculate the Requirements for 4 Molecules of Ammonia**:
- Since the synthesis of 2 molecules of ammonia requires 8 electrons and 16 ATP, we can double these amounts for 4 molecules:
- Electrons required for 4 molecules = 8 electrons × 2 = 16 electrons
- ATP required for 4 molecules = 16 ATP × 2 = 32 ATP

4. **Conclusion**:
- Therefore, for the synthesis of 4 molecules of ammonia, the requirements are:
- **16 electrons**
- **32 ATP molecules**

### Final Answer:
- The correct answer is **16 electrons and 32 ATP**.