Reaction carried out by N2 fixing microbes include
a. 2NH3 + 3O2 → 2NO2 – + 2H+ + 2H2O (i)
b. 2NO2- + O2 → \(\rm 2NO_3^-\) (ii)
Which of the following statements about these equations is not true
1
step (i) is carried out by Nitrosomonas or Nitrococcus
2
step (ii) is carried out by Nitrobacter
3
both steps (i) and (ii) can be called nitrification
4
bacteria carrying out these steps are usually photoautotrophs