Question

Which one is the correct summary equation of nitrogen fixation ?

• A. $N_{2} +8e^{-}+8H^{+}+8ATP \to$ $NH_{3}+H_{2}+16ADP+16P_{1}$
• B. $N_{2} +8e^{-}+8H^{+}+16ATP \to$ $2NH_{3}+H_{2}+16ADP+16P_{1}$
• C. $2NH_{3}+4O_{2}\to2H^{+}+2H_{2}O +2NO^{-}_{3}$
• D. $2NH_{3}+3O_{2}\to2NO^{-}_{2}+2H^{+}+2N_{2}O$

Answer 1

The Correct Option is B

Answer (b) $N_{2} +8e^{-}+8H^{+}+16ATP \to$ $2NH_{3}+H_{2}+16ADP+16P_{1}$

Answer 2

Ans: N2 + 8 H+ + 8 e- + 16 ATP → 2 NH3 + H2 + 16 ADP + 16 Pi

In this equation, 

N2 is the atmospheric nitrogen, and in the stable and unreactive form of nitrogen. 

8H+ are the 8 protons that are needed as the reactants for the reduction process of nitrogen.

Energy is required in the form of 16ATP. 

The products in these reactants are 2 molecules of ammonia, which is a biologically unstable form of N2 and 1 molecule of hydrogen gas. 

Biological nitrogen fixation is carried out by nitrogen fixing bacteria like rhizobia. They are present in the root nodules of leguminous plants. The conversion of atmospheric nitrogen into ammonia is done by an enzyme called nitrogenase. This ammonia can now be available for plants and help in the growth process.