Name the element which is required for the activity of nitrate reductase.

Explanation

To answer the question, "Name the element which is required for the activity of nitrate reductase," follow these steps:

1. **Understand the Function of Nitrate Reductase**: Nitrate reductase is an enzyme that plays a crucial role in the nitrogen cycle. It catalyzes the reduction of nitrate (NO3-) to nitrite (NO2-), which is an important step in nitrogen assimilation in plants.

2. **Identify the Required Element**: Research or recall the elements that are known to be involved in the activity of nitrate reductase.

3. **Conclude with the Correct Element**: The element that is specifically required for the activity of nitrate reductase is molybdenum (Mo).

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