Question

The function of leghemoglobin in the root nodules of legumes is

• A. Oxygen removal
• B. Inhibition of nitrogenase activity
• C. Expression of nif gene
• D. Nodule differentiation

Answer 1

The correct option is A Oxygen removal

• The function of Leghaemoglobin is to aid nitrogen fixation. Hence it cannot inhibit nitrogenase activity.
• The expression of nif gene is controlled by NifA protein.
• Differentiation of nodules is caused by the symbiotic relationship of the plant with Nitrogen-fixing bacteria.
• The main function of leghemoglobin can hence be considered as creating an oxygen-free environment by removing oxygen so that Nitrogen fixation can occur.

So the correct answer is 'Oxygen removal'.