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 Nitrosococcus.
B. Step (ii) is carried out by Nitrobacter
C. Both steps (i) and (ii) can be called nitrofication
D. bacteria carrying out thse steps are usually photoautotrophs.

Answer

D

Explanation

The given reactions are of nitrification. The conversion (oxidation) of ammonia to nitrite is carried out by nitrifying bacteria Nitrosomonas and Nitrosococcus and of nitrite to nitrate by Nitrobacter and Nitrocystic. Bacteria carrying out these steps are chemosautographs, which are able to manufacture their organic food from inorganic raw materials with the help of energy derived from exergonic chamical