Select the incorrect statement for nitrogenase enzyme.

Options

A. Active in anaerobic condition
B. Has limited substrate specificity
C. Oxidoreducatase nature
D. Has 2 components

Answer

To determine the incorrect statement regarding the nitrogenase enzyme, we will analyze each of the four statements provided:

1. **Active in anaerobic conditions**: This statement is correct. Nitrogenase is indeed active in anaerobic conditions, as it is sensitive to oxygen.

2. **Has limited substrate specificity**: This statement is incorrect. Nitrogenase has a broad substrate specificity, allowing it to fix nitrogen from the atmosphere into ammonia.

3. **Oxido-reductase nature**: This statement is correct. Nitrogenase is classified as an oxido-reductase enzyme because it catalyzes the reduction of nitrogen gas (N₂) to ammonia (NH₃).

4. **Has two components**: This statement is also correct. The nitrogenase enzyme is composed of two main components: the dinitrogenase and the dinitrogenase reductase.

Based on the analysis, the incorrect statement regarding the nitrogenase enzyme is:

**Answer**: The statement "has limited substrate specificity" is incorrect.