Question

Find the mismatched pair among the following:
i. Nitrification - Nitrosomonas
ii. Ammonification - Nitrobacter
iii. Denitrification - Azotobacter
iv. Nitrogen Fixation - Nostoc

• A. ii & iii
• B. ii, iii & iv
• C. iii & iv
• D. Only iii

Answer 1

The correct option is A

ii & iii

• Nitrogen fixation, the conversion of atmospheric nitrogen into reactive compounds, is carried out by bacteria and blue green algae like Azotobacter, Rhizobium and Nostoc.
• Ammonification, the process of decomposition of nitrogenous waste into ammonium compounds, is carried out by putrefying bacteria and fungi.
• Nitrosomonas and Nitrobacter are involved in the process of Nitrification and Denitrification process is carried out by soil bacteria such as Pseudomonas sp.