Nitrite is changed to nitrate by _____.

Nitrobacter

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Nitrosomonas

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Clostridium

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Pseudomonas

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Solution

The correct option is A Nitrobacter
There are two steps in nitrification process by which ammonia is converted into nitrite and nitrite into nitrate. The bacteria that convert ammonia to nitrites include Nitrosomonas, Nitrosospira and the bacteria that convert nitrites to nitrates include Nitrobacter, Nitrospina.
Thus, the correct answer is 'Nitrobacter.'

Suggest Corrections

Similar questions

Q. Select the correct matches.
(a) Nitrosomonas - nitrite to nitrate
(b) Thiobacillus - denitrification
(c) Nostoc - free-living nitrogen fixer
(d) Azotobacter - anaerobic nitrogen fixer

Q. Nitrification includes

(a) Oxidation of ammonia to nitrite
(b) Oxidation of nitrite to nitrate

Q. Nitrite is converted to nitrate by

Match the column I and column II.
$\begin{matrix} C o l u m n I & C o l u m n I I A . N i t r o b a c t e r & 1. F r e e - l i v i n g a e r o b i c N_{2} f i x e r B . C l o s t r i d i u m & 2. C o n v e r t s a m m o n i a i n t o n i t r i t e C . N i t r o s o c o c c u s & 3. C h a n g e s n i t r i t e t o n i t r a t e D . A z o t o b a c t e r & 4. F r e e - l i v i n g a n a e r o b i c N_{2} f i x e r \end{matrix}$

Q. Match the columns.

(a)	Nitrobacter	(i)	Free living aerobic nitrogen fixer
(b)	Clostridium	(ii)	Converts ammonia into nitrite
(c)	Nitrosococcus	(iii)	Changes nitrite to nitrate
(d)	Azotobacter	(iv)	Free living anaerobic nitrogen fixer

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