NEET Biology question

Not in NEET syllabus

Reactions carried out by N2-fixing microbes include: 2NH3 + 3O2 → 2NO2⁻ + 2H⁺ + 2H2O ...(i) 2NO2⁻ + O2 → 2NO3⁻ ...(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 steps (i) and (ii) can be called nitrification.
(D)Bacteria carrying out these steps are usually photoautotrophs.Correct

Answer: (D)

Solution

Both reactions together constitute nitrification: step (i), oxidation of ammonia to nitrite, is carried out by *Nitrosomonas*/*Nitrosococcus*; step (ii), oxidation of nitrite to nitrate, is

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Question ID VK-113042