NEET Botany
Nitrogen Fixation
Low Priority
Consistency: 30%
Weightage: 6 / 20 Yrs
High-Yield Trend
1
2021 1
2017 1
2011 1
2010 1
2009 1
2008 Questions 6 MCQs
01
PYQ 2008
easy
botany ID: neet-200
Nitrogen-fixation in root nodules of Alnus is brought about by:
| 1. | Bradyrhizobium | 2. | Clostridium |
| 3. | Frankia | 4. | Azorhizobium |
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02
PYQ 2009
easy
botany ID: neet-200
Which of the following is a symbiotic nitrogen fixer?
1. Glomus
2. Azotobacter
3. Frankia
4. Azolla
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03
PYQ 2010
easy
botany ID: neet-201
The free-living, anaerobic nitrogen-fixer is:
1. Beijerinckia
2. Rhodospirillum
3. Rhizobium
4. Azotobacter
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04
PYQ 2011
medium
botany ID: neet-201
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
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05
PYQ 2017
easy
botany ID: neet-201
Select the mismatch:
| Column I | Column II | |
| 1. | Rhodospirillum | Mycorrhiza |
| 2. | Anabaena | Nitrogen fixer |
| 3. | Rhizobium | Alfalfa |
| 4. | Frankia | Alnus |
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06
PYQ 2021
easy
botany ID: neet-202
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 |
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