Q. No.Which one of the following is not a nitrogen-fixing organism?
1.
Anabaena
2.
Nostoc
3.
Azotobacter
4.
Pseudomonas
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Big holes in Swiss cheese are made by:
| 1. | a machine |
| 2. | a bacterium that produces methane gas |
| 3. | a bacterium producing a large amount of carbon dioxide |
| 4. | a fungus that releases a lot of gases during its metabolic activities. |
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The residue left after methane production from cattle dung is:
| 1. | burnt | 2. | buried in landfills |
| 3. | used as manure | 4. | used in civil construction |
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Match the items in Column ‘A’ and Column ‘B’ and choose the correct answer:
| Column I | Column II | ||
| A. | Lady bird | i. | Methanobacterium |
| B. | Mycorrhiza | ii. | Trichoderma |
| C. | Biological control | iii. | Aphids |
| D. | Biogas | iv. | Glomus |
The correct answer is:
1. A-ii, B-iv, C-iii, D-i
2. A-iii, B-iv, C-ii, D-i
3. A-iv, B-i, C-ii, D-iii
4. A-iii, B-ii, C-i, D-iv
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Which one of the following pairs is not correctly matched?
1. Serratia - Drug addiction
2. Spirulina - Single cell protein
3. Rhizobium - Biofertilizer
4. Streptomyces - Antibiotic
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For retting of jute the fermenting microbe used is
1. Mesophilic bacteria
2. Helicobacter pylori
3. Butyric acid bacteria
4. Streptococcus lactis
Bacillus thuringiensis (Bt) strains have been used for designing novel
1. Bio Insecticidal plants
2. Biomineralization processes
3. Biofertilizers
4. Bio-metallurgical techniques
Which one of the following pairs is incorrectly matched?
|
Microorganism |
Product obtained |
|
|
1. |
Coliforms |
Vinegar |
|
2. |
Methanogens |
Gobar gas |
|
3. |
Yeast |
Ethanol |
|
4. |
Streptomycetes |
Antibiotic |
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