Leg-haemoglobin is found in the nodules in roots of leguminous plants. It acts as .......... scavenger and provides............ conditions for the action of nitrogenase enzyme.

Step-by-step solution

Enzyme nitrogenase: It is a Mo–Fe protein. It requires anaerobic conditions to work. It is highly sensitive to molecular oxygen. It catalyzes the conversion of atmospheric nitrogen to ammonia. Ammonia is the first stable product of nitrogen fixation. N 2 + 8e - + 8H + + 16ATP → 2NH 3 + H 2 + 16ADP + 16Pi