During `N_(2)` fixation, reduction of one molecule of `N_(2)` into two molecules of `NH_(3)` consumes. . . Molecules of ATP. Fill in the blanks with correct option.

Options

A. 4
B. 16
C. 56
D. 38

Answer

To solve the question regarding the number of ATP molecules consumed during the nitrogen fixation process, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Nitrogen Fixation**:
- Nitrogen fixation is the process where atmospheric nitrogen (N₂) is converted into ammonia (NH₃), which is a form that plants can utilize.

2. **Identify the Enzyme Involved**:
- The enzyme responsible for this conversion is called nitrogenase, which is found in certain prokaryotic organisms.

3. **Review the Reaction**:
- The overall reaction for nitrogen fixation involves the reduction of one molecule of N₂ into two molecules of NH₃.

4. **Determine the Energy Requirement**:
- The process of converting N₂ to NH₃ requires energy, which is provided in the form of ATP.

5. **Count the ATP Molecules Used**:
- According to the information provided, the reduction of one molecule of nitrogen into two molecules of ammonia consumes 16 molecules of ATP.

6. **Select the Correct Option**:
- Given the options (4, 16, 56, and 38), the correct answer is 16 molecules of ATP.

### Final Answer:
The correct option is **16 molecules of ATP**.

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