Choose the correct answer from the options given below:
|
List - I
सूची - I
Genes
List-I (Genes
|
List - II
सूची - II
Functions
List-II (Functions
|
||
|---|---|---|---|
| A | nif K nif K | I | FeMo cofactor biosynthesis FeMo cofactor biosynthesis |
| B | nif A nif A | II | $\beta$-subunit of MoFe protein of nitrogenase $\beta$-subunit of MoFe protein of nitrogenase |
| C | nif S nif S | III | Fe protein of nitrogenase Fe protein of nitrogenase |
| D | nif B nif B | IV | Positive regulator of nif and fix genes Positive regulator of nif and fix genes |
| E | nif H nif H | V | Cysteine desulfurase Cysteine desulfurase |
- nif K $
ightarrow$ (II) $\beta$-subunit of MoFe protein: Together with nifD ($\alpha$-subunit), forms the $\alpha_2\beta_2$ tetrameric dinitrogenase catalytic core.
- nif A $
ightarrow$ (IV) Positive regulator of nif and fix genes: Central transcriptional activator that binds upstream activator sequences (UAS) to activate $\sigma^{54}$-dependent nif promoters. - (C) nif S $ ightarrow$ (V) Cysteine desulfurase: Pyridoxal phosphate-dependent enzyme that mobilizes sulfur from L-cysteine for Fe-S cluster core assembly. - (D) nif B $ ightarrow$ (I) FeMo cofactor biosynthesis: Catalyzes the initial assembly of the Fe-S-C core (NifB-co) essential for FeMoco biosynthesis. - (E) nif H $ ightarrow$ (III) Fe protein of nitrogenase: Encodes the $\gamma_2$ homodimeric dinitrogenase reductase that transfers electrons to the MoFe protein.
Correct option: (4) (A) = (I), (B) - (IV), (C) - (V), (0) = (0), (E) =)