Total no. of electron consumed per unit N₂ fixation during BNF is

A. 6

B. 8

C. 12

D. 16

Answer: Option B

Solution(By Examveda Team)

The total number of electrons consumed per unit of nitrogen fixation during Biological Nitrogen Fixation is 8.
The overall reaction for the net formation of 2NH₃ from one N₂ is:
N₂ + 8H⁺ + 8e⁻ + 16ATP + 16H₂O ⟶ 2NH₃ + H₂ + 16ADP + 16Pi
That shows nitrogen element takes 8 hydrogen ions and 8 electrons along with 16 molecules of ATP and water to produce 2 molecules of NH₃.