1
Given below are two statements
Statement (I) : Biological nitrogen fixation is carried out by a highly conserved complex of proteins called the nitrogenase
complex
Statement (II) : Nitrogen fixation requires ten electrons for the reduction of Nz and to produce one molecule of Ho.
In light of the above statements, choose the most appropriate answer from the options given below.
EXPLANATION
Mineral Nutrition, Nitrogen Fixation, & Assim
- Statement (I) is True: Biological nitrogen fixation (BNF) is catalyzed exclusively by the highly conserved prokaryotic nitrogenase multienzyme complex, consisting of dinitrogenase (MoFe protein) and dinitrogenase reductase (Fe protein).
- Statement (II) is False: The stoichiometric reduction of one molecule of $\text{N}_2$ requires 8 electrons and 8 protons (yielding $2\text{NH}_3$ and $1\text{H}_2$), not 10 electrons:
- Conclusion: Statement (I) is true but Statement (II) is false.
Correct option: (3) Statement (I) is true but Statement (II) is false.
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