Question

By which of the following process do bacteria change nitrogen compounds into ammonia?

• A. Denitrification
• B. Ammonification
• C. Decomposition
• D. Nitrification
  
• E. None of the above

Answer 1

The correct option is B Ammonification

A. Nitrate present in soil is reduced to nitrogen by the process of denitrification. This process is carried out by the bacteria Pseudomonas and Thiobacillus.

B. The nitrogenous compounds proteins and nucleic acids of the dead remains of plants, animals and excretory products of animals are degraded by microorganisms with the liberation of ammonia and this process is called ammonification.

C. Decomposition is the breakdown of complex organic material into simpler ones by the action of detritivores.

D. The conversion of ammonia to nitrate by certain microorganisms is called nitrification. It is performed in two steps, nitrite formation and nitrate formation.

So, the correct answer is 'Ammonification'.