Question

For fixation of 2 molecules of dinitrogen into ammonia by Rhizobium leguminosarum, ATP required is hw much??????????
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Answer 1

For fixation of 2 molecules of dinitrogen into ammonia by Rhizobium leguminosarum, 16 ATP molecules are required. Rhizobium leguminosarum is a Species of aerobic nitrogen fixing bacteria which is found in the soil and it is capable of growing on the small root hairs of the leguminous plants which are found in the nature. Rhizobium leguminosarum is a nitrogen-fixing plant symbiont found in the nature.

Answer 2

16 ATP is required.Biological nitrogen fixation is denoted by the following equation.

Here, two moles of ammonia are produced from one mole of nitrogen, at the cost of  16 moles of ATP and a supply of electrons and protons :

N2+ 8H+ + 8e- + 16 ATP ---------> 2NH3 + H2 + 16ADP + 16 Pi.

Nitrogen-fixing microorganisms related cases, the eight high-potential electrons come from reduced ferredoxin, produced by photosynthesis or oxidative processes.

Two molecules of ATP get hydrolyzed for each electron transferred.

Thus, minimum  16 molecules of ATP are hydrolyzed for each molecule of N2 reduced in the reaction.