- 1(current)
Q. No.The product(s) of the reaction catalyzed by nitrogenase in root nodules of leguminous plants is/are.
1. Nitrate alone
2. Ammonia and oxygen
3. Ammonia and hydrogen
4. Ammonia alone
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) |
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Roots of which plant contains a pink pigment that has an affinity for oxygen:
1. Carrot
2. Soyabean
3. Mustard
4. Radish
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Both Rhizobium and Frankia:
1. are symbionts with legumes
2. are symbionts with actinorrhizal plants
3. initiate the formation of root nodules in the symbiont plant
4. are filamentous bacteria
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A plant infected with Rhizobium:
1. has necrotic tissues.
2. dies.
3. gets flaccid.
4. probably will grow faster.
- 1(current)
Q. No.
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