Match List - I with List - 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 the options given below:
Options: (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 |
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Which of the following protects nitrogenase inside the root nodule of a leguminous plant ?
1. Catalase
2. leg haemoglobin
3. Transaminase
4. Glutamate dehydrogenase
Subtopic:  Nitrogen Fixation | Nodule formation |
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Which of the following pair represents free living nitrogen fixing aerobic bacteria?
1. Rhizobium and Frankia
2. Azotobacter and Beijernickia
3. Anabaena and Rhodospirillum
4. Pseudomonas and Thiobacillus
Subtopic:  Nitrogen Fixation | Nodule formation |
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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:

Options: (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 |
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Which of the following bacteria reduce nitrate in soil into nitrogen?

1. Nitrobacter

2. Thiobacillus

3. Nitrococcus

4. Nitrosomonas

Subtopic:  Nitrogen Fixation |
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Select the mismatch:

Column I Column II
1. Rhodospirillum Mycorrhiza
2. Anabaena Nitrogen fixer
3. Rhizobium Alfalfa
4. Frankia Alnus

Subtopic:  Nitrogen Fixation |
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Nitrifying bacteria:

1.  convert free nitrogen to nitrogen compounds
2.  convert proteins into ammonia
3.  reduce nitrates to free nitrogen
4.  oxidize ammonia to nitrates

Subtopic:  Nitrogen Fixation |
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The free-living, anaerobic nitrogen-fixer is:

1. Beijerinckia

2. Rhodospirillum

3. Rhizobium

4. Azotobacter

Subtopic:  Nitrogen Fixation |
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Study the cycle shown below and select the option which gives the correct words for all four blanks A, B, C, and D:

   

 Options:

A B C D
1. Denitrification Ammonification Plants Animals
2. Nitrification Denitrification Animals Plants
3. Denitrification Nitrification Plants Animals
4. Nitrification Ammonification Animals Plants
Subtopic:  Nitrogen Fixation |
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Which of the following is a symbiotic nitrogen fixer?
1. Glomus
2. Azotobacter
3. Frankia
4. Azolla

Subtopic:  Nitrogen Fixation | Genetics & Biochemistry of Nitrogen Fixation |
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