N2 is fixed by microbes
What will be an ideal response?
•Needed by all organisms for basic cellular processes: ~80% of air is gaseous nitrogen.
-But atmospheric form, N2, is very stable.
•To be assimilated, N2 gas must be converted to ammonia (NH3/NH4+).
N2 + 8H+ + 8e- + 16 ATP ? 2 NH3 + H2 + 16 ADP + 16 Pi
•NH4+ is then assimilated by microbes and plants to form amino acids (e.g. glutamate
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