Question

Conversion of organic nitrogen into ammonia, nitrogen gas into ammonia, nitrates into ammonia, ammonia into nitrates is respectively known as

• A. Nitrogen fixation, nitrate reduction, nitrification, ammonification..
• B. Ammonification, nitrogen fixation, nitrate reduction, nitrification.
• C. Nitrification, ammonification, nitrogen fixation, nitrate reduction.
• D. Nitrogen fixation, nitrate reduction, denitrification, ammonification.

Answer 1

Answer: (B)

Ammonification, nitrogen fixation, nitrate reduction, nitrification.

Conversion of any nitrogenous compound into ammonia is termed as ammonification. Conversion of the gaseous nitrogen into ammonia is termed as nitrogen fixation and is carried out by enzyme nitrogenase complex. Conversion of nitrates into ammonia is called as nitrate reduction as nitrates are being reduced into ammonia. The conversion of ammonia into nitrates is termed as nitrification and is carried out by chemolithotrophic bacteria; nitrosomonas and nitrobacter.