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NEET 2021
Exam
NEET
Year
2021
Subject
Botany
Chapter
Mineral Nutrition

NEET 2021 · Botany · Mineral Nutrition

Match Column - I with Column - II. List-I List-II (a) Nitrococcus...

Match Column - I with Column - II.

List-I List-II
(a) Nitrococcus (i) Denitrification
(b) Rhizobium (ii) Conversion of ammonia to nitrite
(c) Thiobacillus (iii) Conversion of nitrite to nitrate
(d) Nitrobacter (iv) Conversion of atmospheric nitrogen to ammonia
Choose the correct answer from options given below.

Options

  1. A(a)−(ii);(b)−(iv);(c)−(i);(d)−(iii)( a ) - ( ii ) ; ( b ) - ( iv ) ; ( c ) - ( i ) ; ( d ) - ( iii )
  2. B(a)−(i);(b)−(ii);(c)−(iii);(d)−(iv)( a ) - ( i ) ; ( b ) - ( ii ) ; ( c ) - ( iii ) ; ( d ) - ( iv )
  3. C(a)−(iii);(b)−(i);(c)−(iv);(d)−(ii)( a ) - ( iii ) ; ( b ) - ( i ) ; ( c ) - ( iv ) ; ( d ) - ( ii )
  4. D(a)−(iv);(b)−(iii);(c)−(ii);(d)−(i)( a ) - ( iv ) ; ( b ) - ( iii ) ; ( c ) - ( ii ) ; ( d ) - ( i )

Correct answer

A. (a)−(ii);(b)−(iv);(c)−(i);(d)−(iii)( a ) - ( ii ) ; ( b ) - ( iv ) ; ( c ) - ( i ) ; ( d ) - ( iii )

Step-by-step solution

(a) - (ii). In the process of nitrogen fixation, first ammonia is converted into nitrite. This is accomplished by the bacteria Nitrosomonas and Nitrococcus.
(b) - (iy). One of the most important symbiotic bacterium, Rhizobium, remains associated with the roots of leguminous plants. They help in the conversion of atmospheric nitrogen into ammonia.
(c) - (i). Denitrification is carried out by the genera Pseudomonas and Thiobacillus. Nitrate present in the soil is also reduced to nitrogen by the process of denitrification.
(d) - (iii). The nitrification process also involves the conversion of nitrite to nitrate. The nitrite is further oxidised to nitrate with the help of the bacterium Nitcobacter.
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