What is nitrogen fixation?

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Question

(D) Biological nitrogen fixation is the process by which atmospheric nitrogen $(N_2)$ is converted into ammonia $(NH_3)$ by living organisms like bact

Vedclass · Accepted Answer

Both $(a)$ and $(b)$

Vedclass · Answer

(D) Biological nitrogen fixation is the process by which atmospheric nitrogen $(N_2)$ is converted into ammonia $(NH_3)$ by living organisms like bacteria (e.g.,Rhizobium). Additionally,in the nitrogen cycle,nitrogen can also be converted into nitrates $(NO_3^-)$ through biological or atmospheric processes. Since both conversions represent pathways of nitrogen fixation in different contexts,option $(d)$ is the most appropriate answer.

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$(1)$ Reduction of nitrogen to ammonia : Biological nitrogen fixation : Nitrogenase : ........
$(2)$ Free-living bacteria : Rhodospirillum : Free-living blue-green algae : ........

We find that $Rhizobium$ forms nodules on the roots of leguminous plants. Also,$Frankia$,another microbe,forms nitrogen-fixing nodules on the roots of the non-leguminous plant $Alnus$. Can we artificially induce the property of nitrogen fixation in a plant,whether leguminous or non-leguminous?

Green manure plants belong to

Which of the following are free-living nitrogen-fixing microbes?

$N_2 + 8e^- + X + 16 ATP \rightleftharpoons 2NH_3 + Y + 16 ADP + 16 \Pi$

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