The reaction 2 NO_2^{-} + O_2 rightarrow 2 NO | vedclass

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(C) The process of nitrification involves the oxidation of ammonia to nitrite and then nitrite to nitrate. $1$. Ammonia is oxidized to nitrite $(NO_2^

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Nitrobacter

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(C) The process of nitrification involves the oxidation of ammonia to nitrite and then nitrite to nitrate. $1$. Ammonia is oxidized to nitrite $(NO_2^{-})$ by bacteria such as $Nitrosomonas$ and $Nitrococcus$. $2$. Nitrite is further oxidized to nitrate $(NO_3^{-})$ by the bacterium $Nitrobacter$. Therefore,the reaction $2 NO_2^{-} + O_2 \rightarrow 2 NO_3^{-}$ is specifically carried out by $Nitrobacter$.

Column $I$	Column $II$
$A$. Thiobacillus	$1$. Free-living nitrogen-fixing cyanobacteria
$B$. Nitrosomonas	$2$. Denitrification
$C$. Nostoc	$3$. Free-living aerobic nitrogen-fixing bacteria
$D$. Azotobacter	$4$. $NH_{3}$ to Nitrite

The reaction $2 NO_2^{-} + O_2 \rightarrow 2 NO_3^{-}$ is carried out by which of the following microorganisms?

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