Biology
Grade-10
Easy

Question

Which of the following can be termed as nitrification?

  1. Conversion of nitrites to nitrates
  2. Conversion of nitrates to nitrogen then to nitrites
  3. Conversion of ammonia to nitrites
  4. Conversion of ammonia to nitrites then to nitrates

hintHint:

Nitrification is a microbial process by which reduced nitrogen compounds (primarily ammonia) are sequentially oxidized to nitrite and nitrate.

The correct answer is: Conversion of ammonia to nitrites then to nitrates


    • Nitrification is the natural process that occurs in the environment by specialized autotrophic bacteria. During this aerobic process, ammonia is converted to nitrites (NO2-) and then nitrates (NO3-).
    • Ammonia is present in drinking water through either naturally-occurring processes or through ammonia addition during secondary disinfection to form chloramines
    • A group of specialized gram-negative, rod-shaped chemoautotrophic bacteria called Nitrosomonas helps in nitrification.

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