The first stable product of fixation of atmospheric nitrogen

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The first stable product of fixation of atmospheric nitrogen in leguminous plants is :

1. Ammonia
2. NO₃^-
3. Glutamate
4. NO₂^-

Correct Option: A

Ammonia is the first stable compound produced in fixation of atmospheric nitrogen in leguminous plant. A molecule of nitrogen is changed into two molecules of ammonia. It requires 16 ATP, a source of electron donor ferredoxin, hydrogen donor NADPH or FMNH₂ and dinitrogenase enzyme.