NEET BIOLOGY

Detailed explanation-1: -The nitrogenase enzyme requires a high input of energy in the form of ATP. ATP is used to transfer hydrogen atoms to dinitrogen during biological nitrogen fixation .

Detailed explanation-2: -The nitrogenase enzyme requires anaerobic conditions for its activity.

Detailed explanation-3: -Nitrogenase, the enzyme solely responsible for replenishing the nitrogen cycle from atmospheric dinitrogen, catalyzes the ATP-dependent reduction of N2 to ammonia.

Detailed explanation-4: -The Nitrogenase enzyme complex (the nitrogen. fixing enzyme) is sensitive to O2, that irreversible inactivates the enzyme. Diazotrophs must employ mechanisms which, on the other hand, permit the supply of O2 required for energy regeneration and protect Nase from the deleterious effect of O2.

Detailed explanation-5: -Solution: The enzyme nitrogenase is highly sensitive to the molecular oxygen; it requires anaerobic conditions.