Q15 / 161 · NTA Abhyas (NEET) 2020 · Botany · Mineral Nutrition

The process of nitrogen cycling by microbes involves multiple steps of oxidation and simultaneous reduction. The following reaction occurring during one such step is brought about by which bacteria?

Figure

  • A
    Pseudomonas
  • B
    Nitrosomonas
  • Correct answer
    C
    Nitrobacter
  • D
    Thiobacillus

Solution

The reaction is the oxidation of nitrite into nitrate. This reaction is catalyzed by the bacteria Nitrobacter. Nitrosomonas and Nitrococcus are responsible for the Ammonia to nitrite. Thiobacillus and Pseudomonas are responsible for denitrification.

Hence, the correct answer is option: 'C'.

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