Question

Which of the following is incorrect about nitrogen fixation in root nodule?

• A. It requires nitrogenase enzyme.
• B. Leghaemoglobin acts as oxygen scavenger.
• C. Mg is required as cofactor for nitrogenase enzyme.
• D. Process uses atmospheric nitrogen.

Answer 1

The correct option is C Mg is required as cofactor for nitrogenase enzyme.

$M{o}^{2+}$ acts as a cofactor for the enzyme nitrogenase, and the absence of it inactivates the activity of the enzyme.

In nitrogen fixation through root nodule, atmospheric nitrogen is used to convert into ammonia by enzyme nitrogenase and leghaemoglobin. Leghaemoglobin acts as oxygen scavenger.