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Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A) : Biological nitrogen fixation is carried out by the nitrogenase complex which consists of reductase and
nitrogenase
Reason (R) : Reductase provides electrons with high reducing power, and a nitrogenase uses these electrons to reduce No
to NHs
In light of the above statements, choose the correct answer from the options given below.
EXPLANATION
Nitrogen, Sulfur, & Lipid Metabolism & Assimi
- Assertion (A) is True: Biological nitrogen fixation (BNF) is executed by the two-component nitrogenase multienzyme complex comprising dinitrogenase reductase (Fe protein) and dinitrogenase (MoFe protein).
- Reason (R) is True & Explains (A): The Fe protein (reductase) couples ATP hydrolysis to deliver low-potential electrons to the MoFe protein (nitrogenase), which utilizes the catalytic FeMo cofactor (FeMoco) to bind and reduce molecular $\text{N}_2$ to $2\text{NH}_3$.
- Conclusion: Both (A) and (R) are true and (R) is the correct explanation of (A).
Correct option: (1) Both (A) and (R) are true and (R) is the correct explanation of (A)
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