Correct Answer - Option 1 : Molybdenum
Concept:
-
Nitrogen fixation is the chemical process by which atmospheric nitrogen is assimilated into organic compounds, especially by certain microorganisms as part of the nitrogen cycle.
- Atmospheric nitrogen is fixed by several methods like biological N2 fixation, Industrial N2 fixation & Electrical N2 fixation.
- It is a necessary process, as the fixed nitrogen is used in the biosynthesis of several organic compounds like amino acids, proteins, nucleic acids, etc.
Explanation:
Biological Nitrogen Fixation (BNF) -
- Atmospheric nitrogen cannot be absorbed directly by the plants so it is first converted into stable compound ammonia (NH3) in the roots, with the help of symbiotic bacteria this is called biological nitrogen fixation
- N2 → N2H2 → N2H4 → 2NH3
(nitrogen) (dimide) (hydrazine) (ammonia)
- All biological nitrogen fixation is affected by enzymes called nitrogenases.
- These enzymes contain Iron (Fe), often with a second metal, usually, Molybdenum (Mo) or sometimes Vanadium (V).
Thus, Molybdenum, Iron & Vanadium are the elements plays an important role in biological nitrogen fixation
