Nitrate reductase enzyme is responsible for the formation of

Options

A. `N_(2)`
B. `NO_(2)`
C. `NO_(3)`
D. Ammonia

Explanation

**Step-by-Step Solution:**

1. **Understanding Nitrate Reductase**: Nitrate reductase is an enzyme that catalyzes the reduction of nitrate (NO3-) to nitrite (NO2-). This is an essential step in the nitrogen cycle, where nitrogen compounds are converted into forms usable by plants.

2. **Identifying the Reaction**: The specific reaction that occurs is:
\[ \text{Nitrate (NO}_3^-) + \text{e}^- \rightarrow \text{Nitrite (NO}_2^-) \]
Here, an electron (e^-) is added to the nitrate molecule, resulting in the formation of nitrite.

3. **Role of Enzymes**: Enzymes like nitrate reductase act as biological catalysts. They speed up reactions by lowering the activation energy required for the reaction to proceed. This means that the reaction can occur more quickly and efficiently.

4. **Conclusion**: Since the primary function of nitrate reductase is to convert nitrate into nitrite, the answer to the question is that the nitrate reductase enzyme is responsible for the formation of **Nitrite**.

**Final Answer**: Nitrite

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