(a) The enzyme nitrogenase in root nodules
of legume plants catalyses the conversion of : atmospheric N2 to ammonia (NH3).
N2 + 8e- + 8H+ + 16AIP >2NH3 + H2 + 16ADP+16Pi
(Nitrogen) (Ammonia)
(b) Leghaemoglobin is an oxygen scavenger. It protects nitrogenase from oxygen