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NEET 2013
Exam
NEET
Year
2013
Subject
Botany
Chapter
Mineral Nutrition

NEET 2013 · Botany · Mineral Nutrition

The first stable product of fixation of atmospheric nitrogen in...

The first stable product of fixation of atmospheric nitrogen in leguminous plants is

Options

  1. ANO2−\mathrm{NO}_2^{-}
  2. Bammonia
  3. CNO3−\mathrm{NO}_3^{-}
  4. Dglutarnate

Correct answer

B. ammonia

Step-by-step solution

The process of conversion of nitrogen (N2)\left(\mathrm{N}_2\right) to ammonia is termed as nitrogen fixation. N2→N2H2→N2H4→2NH3\mathrm{N}_{2} \rightarrow \mathrm{N}_{2} \mathrm{H}_{2} \rightarrow \mathrm{N}_{2} \mathrm{H}_{4} → 2 \mathrm{NH}_{3} (Nitrogen) (Dimide) (Hydrazine) (Ammonia) 2NH3+3O2⟶2NO2−+2H++2H2O2NO2+O2⟶2NO3−\begin{aligned}& 2 \mathrm{NH}_{3}+3 \mathrm{O}_{2} \longrightarrow 2 \mathrm{NO}_{2}^{-}+2 \mathrm{H}^{+}+2 \mathrm{H}_{2} \mathrm{O}\\ & 2 \mathrm{NO}_{2}+ \mathrm{O}_{2} \longrightarrow 2 \mathrm{NO}_{3}^{-} \end{aligned} In reductiveanimationammoniareactswithα−ketoglutaricacidandformsglutamicacidα−ketoglutaricacid+NH4++NADPH⟶ Glutamate  Dehydrogenae  Glutamate +H2O+NADPreductive animation ammonia reacts with \alpha-ketoglutaric acid and forms glutamic acid \alpha-ketoglutaric acid +\mathrm{NH}_4^{+}+\mathrm{NADPH} \underset{\text{ Dehydrogenae }}{\stackrel{\text{ Glutamate }}{\longrightarrow}} \text{ Glutamate }+\mathrm{H}_{2} \mathrm{O}+\mathrm{NADP}
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