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Mineral Nutrition — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYMineral Nutrition3 Marks
Question
Describe nitrification along with the equations and the organisms involved in each step.
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Answer

  1. Nitrification is the process of oxidation of ammonia, first into nitrite and then into nitrate.
  2. Ammonia is oxidised into nitrite, by bacteria like Nitrococcus and Nitrosomonas.
$2\text{NH}_3+3\text{O}_2\xrightarrow{\ \ \ \ \ }2\text{NO}_{2}^{-}+2\text{H}^++2\text{H}_2\text{O}$
  1. Nitrite is further oxidised to nitrate with the help of bacteria Nitrobacter.
$2\text{NO}_2+\text{O}_2\xrightarrow{\ \ \ }2\text{NO}_3$

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