Carefully read the following reactions carried out by nitrifying bacteria. Identify the statement about these equations which is not true.
2NH $_{3}$ +3O $_{2}$ $\to$ 2NO $_{2}^{-}$ +2H $^{+}$ +2H $_{2} O$ ---- (I)
2NO $_{2}^{-}$ +O $_{2}$ $\to$ 2NO $_{3}^{-}$ ---- (II)
Both the steps occur only in photoautotrophs
Step I is carried out by Nitrosomonas or Nitrosococcus
Both the steps I and II can be called nitrification
Step II is carried out by Nitrobacter

Question

Carefully read the following reactions carried out by nitrifying bacteria. Identify the statement about these equations which is not true.
2NH $_{3}$ +3O $_{2}$ $\to$ 2NO $_{2}^{-}$ +2H $^{+}$ +2H $_{2} O$ ---- (I)
2NO $_{2}^{-}$ +O $_{2}$ $\to$ 2NO $_{3}^{-}$ ---- (II)
Both the steps occur only in photoautotrophs
Step I is carried out by Nitrosomonas or Nitrosococcus
Both the steps I and II can be called nitrification
Step II is carried out by Nitrobacter

Toppr Admin · Accepted Answer

I- In the first step- ammonia is oxidised to nitrites by the action of nitrosomonas and nitrococcus bacteria-II- In the second step- nitrate is further oxidised to nitrate with the help of nitrobacter and nitrocystis-Both the reaction is involved in the process of nitrification- These nitrifying bacteria involved are called chemoautotrophs-So the correct answer is -apos-Both the steps occur only in photoautotrophs-apos-