Match the following list of bioactive substances and their roles:
Bioactive | Substance Role | ||
A. | Statin | i. | Removal of oil stains |
B. | Cyclosporin A | ii. | Removal of clots from blood vessels |
C. | Streptokinase | iii. | Lowering of blood cholesterol |
D. | Lipase | iv. | Immuno-suppressive agent |
Choose the correct match:
1. | A-ii, B-iii, C-i, D-iv | 2. | A-iv, B-ii, C-i, D-iii |
3. | A-iv, B-i, C-ii, D-iii | 4. | A-iii, B-iv, C-ii, D-i |
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The primary treatment of wastewater involves the removal of:
1. | dissolved impurities | 2. | stable particles |
3. | toxic substances | 4. | harmful bacteria |
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The technology of biogas production from cow dung was developed in India largely due to the efforts of:
1. | Gas Authority of India |
2. | Oil and Natural Gas Commission |
3. | Indian Agricultural Research Institute and Khadi & Village Industries Commission |
4. | Indian Oil Corporation |
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The free-living fungus Trichoderma can be used for:
1. killing insects
2. biological control of plant diseases
3. controlling butterfly caterpillars
4. producing antibiotics
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Mycorrhiza does not help the host plant in:
1. | Enhancing its phosphorus uptake capacity |
2. | Increasing its tolerance to drought |
3. | Enhancing its resistance to root pathogens |
4. | Increasing its resistance to insects |
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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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Methanogens do not produce:
1. | oxygen | 2. | methane |
3. | hydrogen sulfide | 4. | carbon dioxide |
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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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