Question

For nitrogen to be in a biologically useful form,

denitrification must convert $\text{N}$ to ${}_{}^{}\text{.}$

annamox bacteria must convert $\text{N}$ to ${}_{}^{}\text{.}$

diazotrophs must fix atmospheric nitrogen.

the combined actions of dinitrogenase reductase and dintrogenase convert $\text{N}$ to $\text{NO}$ in an ATP‑depend

Answer 1

The answer to the question is as follows - for Nitrogen to be in a biologically useful form, following must occur - Diazotrophs must fix atmospheric nitrogen Diazotrophs are bacteria that causes nitrogen fixation by converting atmospheric nitrogen into nitrates Plant Can use nitrogen in form & nitrates from soil to make protein. Example & diazotrophs are Rhizobium , Azotobacter and Azospirillum. They have Iron molybdenum or vanadium nitrogenase system for nitrogen fixation Rhizobium bacteria present in root nodule of leguminous. plants (pea, beans etc) fixes atmospheric N2 into nitrates (NO3). Denitrification is a process in which retrate (No a converted into nitrogen by bacteria (denitrifying bacteria ) at is opposite to nitrogen fixation Annamox bacteria convert ammonium ion (NH, TY and nitrites (Nor) into nitrogen They oxidizes Nhut to nitrogen, Dinitrogenase reductase give electron to dinitrogenase and convert nitrogen into ammonium (NH4+) Dinitrogenase reductase binds ATP Nitrogenase brings conversion 8 Ny into Nuut (not into Nitrates).