Reaction carried out by `N_(2)` fixing microbes include
`2NH_(3)+3O_(2)to2NO_(2)^(-)+2H^(+)+2H_(2)O` …(i)
`2NO_(2)^(-)+O_(2)to2NO_(3)^(-)` ….(ii) Which of the following statements about these equations is not true?

Options

A. Step (i) is carried out by Nitrosomonas or Nitrococcus
B. Step (ii) is carried out by Nitrobacter
C. Both steps (i) and (ii) can be called nitrification
D. Bacteria carrying out these steps are usually photoautotrophs

Answer

D

Explanation

Given reactions of nitrification. The conversion of ammonia to nitrite is carried out by nitrifying bacteria. Nitrosomonas and Nitrococcus and of nitrite to nitrate by Nitrobacter and Nitrocystis. Bacteria carrying out these steps are chemoautotroph which is able to manufacture their organic food from inorganic raw materials with the help of energy derived from exergonic chemical reactions.