Which enzyme converts atmospheric nitrogen into ammonia ?

Explanation

**Step-by-Step Text Solution:**

1. **Understanding Nitrogen Fixation**: The process of converting atmospheric nitrogen (N₂) into ammonia (NH₃) is known as nitrogen fixation. This is a crucial process for making nitrogen available to living organisms, as they cannot directly utilize atmospheric nitrogen.

2. **Identifying the Enzyme**: The specific enzyme responsible for the conversion of atmospheric nitrogen into ammonia is called nitrogenase. This enzyme catalyzes the reaction that allows nitrogen gas to be reduced to ammonia.

3. **Role of Bacteria**: Nitrogen fixation is not only a chemical process but also involves certain bacteria that possess the nitrogenase enzyme. These bacteria play a significant role in the nitrogen cycle by facilitating this conversion.

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