Match Column-I with Column- II.

Column I Column II
(a) Nitrococcus (i) Denitrification
(b) Rhizobium (ii) Conversion of ammonia to nitrite
(c) Thiobacillus (iii) Conversion of nitrite to nitrate
(d) Nitrobactèr (iv) Conversion of atmospheric nitrogen to ammonia

Choose the correct answer from the options given below.

(a) (b) (c) (d)
1. (iii) (i) (iv) (ii)
2. (iv) (iii) (ii) (i)
3. (ii) (iv) (i) (iii)
4. (i) (ii) (iii) (iv)
Subtopic:  Nitrogen Fixation | Nodule formation |
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Which of the following is a non–symbiotic nitrogen fixing bacteria?
1.  Rhizobium
2.  Mycorrhiza
3.  Azotobacter
4.  Nitrosomonas

Subtopic:  Nitrogen Fixation |
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Nitrogen-fixing bacteria converts:
1. N2  NH3
2. NH4+  Nitrates
3. NO2  NO3
4. NO3  N2

Subtopic:  Nitrogen Fixation |
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A plant infected with Rhizobium:
1. has necrotic tissues.
2. dies.
3. gets flaccid.
4. probably will grow faster.

Subtopic:  Nitrogen Fixation | Nodule formation |
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For each molecule of ammonia produced during biological nitrogen fixation, the number of ATP molecules required is:
1. 4
2. 8
3. 12
4. 16

Subtopic:  Nitrogen Fixation |
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