Which plant nutrient is a component of enzyme nitrogenase ?

Options

A. Magnesium
B. Molybdenum
C. Potassium
D. Phosphorus

Answer

To determine which plant nutrient is a component of the enzyme nitrogenase, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Nitrogenase**:
- Nitrogenase is an enzyme that catalyzes the conversion of atmospheric nitrogen (N₂) into ammonia (NH₃). This process is known as nitrogen fixation and is crucial for making nitrogen available to plants.

2. **Components of Nitrogenase**:
- Nitrogenase is a complex enzyme that contains several metal ions as cofactors. The most important metal ions involved in its activity are molybdenum (Mo) and iron (Fe).

3. **Identifying the Nutrient**:
- Among the various nutrients, molybdenum is specifically known to be a critical component of nitrogenase. It plays a vital role in the enzyme's function, allowing it to facilitate the nitrogen fixation process.

4. **Conclusion**:
- The plant nutrient that is a component of the enzyme nitrogenase is **Molybdenum**.