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NEET 2011
Exam
NEET
Year
2011
Subject
Botany
Chapter
Mineral Nutrition

NEET 2011 · Botany · Mineral Nutrition

Nitrifying bacteria

Nitrifying bacteria

Options

  1. Aconvert free nitrogen to nitrogen compounds
  2. Bconvert proteins into ammonia
  3. Creduce nitrates to free nitrogen
  4. Doxidize ammonia to nitrates

Correct answer

D. oxidize ammonia to nitrates

Step-by-step solution

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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