Question

Reaction carried out by $N_2$ fixing microbes include
$2N{H}_3+3O_2\to 2N{O}_2^{-}+2H^{+}+2H_{2}O$ (i)
$2N{O}_2^{-}+O_2\to 2N{O}_3^{-}$ (ii)
Which of the following statements about these equations is not true?

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

Answer 1

Answer: (D)

Bacteria carrying out these steps are usually photoautotrophs.

Phototrophic bacteria are a group of bacteria, whose energy for growth is derived from sunlight and their source of carbon comes from carbon dioxide or organic carbon.

So, the correct option is 'Bacteria carrying out these steps are usually photoautotrophs'.