Q. No.A nitrogen-fixing microbe associated with Azolla in rice fields is:
1. Spirulina
2. Anabaena
3. Frankia
4. Tolypothrix
1. Rhizobium
2. Nostoc
3. Mycorrhiza
4. Agrobacterium
| 1. | Azospirillum | 2. | Rhizobium |
| 3. | Nostoc | 4. | Azotobacter |
The common nitrogen-fixer in paddy fields is:
1. Rhizobium
2. Azospirillum
3. Oscillatoria
4. Frankia
The bacteria and mould involved in the work of Alexander Fleming are :-
1. Staphylococci and Penicillium chrysogenum
2. Streptococci and Penicillium chrysogenum
3. Staphylococci and Penicillium notatum
4. Streptococci and Penicillium notatum
Name the product formed by Trichoderma polysporum and give its use.
| 1. | Statins, which are used as blood cholesterol-lowering agent. |
| 2. | Cyclosporin A that is used as an immunosuppressive agent. |
| 3. | Statins, which are used as a clot buster. |
| 4. | Cyclosporin A that is used to inhibit the enzyme responsible for cholesterol synthesis. |
Which one of the following pairs is wrongly matched?
1. Detergents-Lipase
2. Alcohol-Nitrogenase
3. Fruit juice-Pectinase
4. Textile-Amylase
1. bioremediation of contaminated soils
2. reclamation of wastelands
3. gene transfer in higher plants
4. biological control of soil-borne plant pathogens
A genetically engineered micro-organism used successfully in the bioremediation of oil spills is a species of:
1. Pseudomonas
2. Trichoderma
3. Xanthomonas
4. Bacillus
Which one of the following pairs is wrongly matched?
1. Methanogens - Gobar gas
2. Yeast - Ethanol
3. Streptomycetes - Antibiotic
4. Coliforms - Vinegar
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