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Question: Answered & Verified by Expert
Nitrifying bacteria
BiologyMineral NutritionNEETNEET 2011 (Screening)
Options:
  • A convert free nitrogen to nitrogen compounds
  • B convert proteins into ammonia
  • C reduce nitrates to free nitrogen
  • D oxidize ammonia to nitrates
Solution:
1953 Upvotes Verified Answer
The correct answer is: oxidize ammonia to nitrates
Nitrifying bacteria (one of the chemosynthetic bacteria) oxidise ammonia to nitrites and obtain energy for the preparation of food. This oxidation occurs in two steps. In the first step, ammonia is oxidised to nitrite by nitrite bacteria (e.g., Nitrosomonas and Nitrocaccus). In the second step, nitrite is oxidised to nitrate by nitrate bacteria (e.g., Nitrocystis and Nitrobacter).

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