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(A) $N_2$ fixation is the process of converting atmospheric dinitrogen $(N_2)$ into ammonia $(NH_3)$.Biological nitrogen fixation is carried out by pr

Vedclass · Accepted Answer

$N_2 	o NH_3$

Vedclass · Answer

(A) $N_2$ fixation is the process of converting atmospheric dinitrogen $(N_2)$ into ammonia $(NH_3)$.Biological nitrogen fixation is carried out by prokaryotes using the enzyme nitrogenase,which reduces $N_2$ to $NH_3$.While $N_2$ can also be converted to nitrates $(NO_3^-)$ via industrial or atmospheric processes (like lightning),the term '$N_2$ fixation' in biological contexts specifically refers to the reduction of $N_2$ to $NH_3$ as the primary stable product available for assimilation.Therefore,option $(a)$ is the most accurate representation of biological $N_2$ fixation.

$N_2$ fixation is

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