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?

Step-by-step 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.