Question

Match the lists

	I		II
(a)	Nitrosomonas	$\left(1\right)$	Denitrifying bacteria
(b)	Nitrobacter	$\left(2\right)$	Soil bacteria
(c)	Pseudomonas	$\left(3\right)$	Nitrate bacteria
(d)	Azotobacter	$\left(4\right)$	Nitrite bacteria

• A. $a-4,b-3,c-1,d-2$
• B. $a-1,b-2,c-4,d-3$
• C. $a-4,b-3,c-2,d-1$
• D. $a-2,b-3,c-1,d-4$

Answer 1

Answer: (A)

$a-4,b-3,c-1,d-2$

Nitrosomonas is a nitrite bacteria that convert the ammonia into nitrites, the process called nitrification.

Nitrobacter is a nitrate bacteria that convert the nitrites into nitrates.

Pseudomonas is a denitrifying bacteria that convert the nitrates into the nitrogen through an intermediate product.

Azotobacter is a soil bacteria, a free-living bacteria are able to convert dinitrogen from the soil atmosphere into nitrogenous materials like amino acids.

So the correct answer is 'a-4, b-3, c-1, d-2'.