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Q. No.Mycorrhizal symbiotic fungi in plants commonly belong to the Genus:
1. Glomus
2. Philaphora
3. Byssoclamys
4. Paecilomyces
Subtopic: Microbes as Biofertilizer |
97%
Level 1: 80%+
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Treatment of waste-water is done by the:
| 1. | heterotrophic microbes naturally present in the sewage. |
| 2. | photosynthetic autotrophic microbes naturally present in the sewage. |
| 3. | methanogens. |
| 4. | anaerobic microbes added as inoculum. |
Subtopic: Microbes in Sewage Treatment |
69%
Level 2: 60%+
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A small part of the activated sludge in sewage treatment plant is:
| 1. | pumped back into the aeration tank to serve as the inoculum. |
| 2. | added to the fresh water rivers. |
| 3. | is used to produce probiotics. |
| 4. | pumped into large tanks called anaerobic sludge digesters. |
Subtopic: Microbes in Sewage Treatment |
92%
Level 1: 80%+
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The large holes in the cheese shown below is due to fermentation carried out by:
1. Penicillium
2. Propionibacterium
3. Saccharomyces
4. Streptomyces
1. Penicillium
2. Propionibacterium
3. Saccharomyces
4. Streptomyces
Subtopic: Microbes in Household Products |
86%
Level 1: 80%+
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Consider the given two statements:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | Yeast (Saccharomyces cerevisiae) is used for commercial production of ethanol. |
| II: | Statins are produced by the yeast Monascus purpureus |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Chemicals, Enzymes & Other Bioactive Molecules |
91%
Level 1: 80%+
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Methanogenic bacteria are found in:
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
| I: | rumen of cattle | II: | activated sludge |
2. Only II
3. Both I and II
4. Neither I nor II
Subtopic: Microbes in Production of Biogas |
Level 4: Below 35%
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The technology of biogas production from cow dung was developed in India largely due to the efforts of:
| 1. | Indian Renewable Energy Development Agency Limited |
| 2. | Oil and Natural Gas Commission |
| 3. | Indian Agricultural Research Institute and Khadi & Village Industries Commission |
| 4. | Indian Oil Corporation. |
Subtopic: Microbes in Production of Biogas |
98%
Level 1: 80%+
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If oxygen availability to activated sludge flocs in a sewage treatment plant is reduced:
| 1. | the rate of degradation of organic matter slows down |
| 2. | the center of flocs becomes anoxic, causing death of bacteria and eventually breakage of flocs. |
| 3. | the flocs would increase in size as anaerobic bacteria would grow around flocs. |
| 4. | Protozoa would grow in large numbers. |
Subtopic: Microbes in Sewage Treatment |
Level 3: 35%-60%
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Mycorrhizal symbiotic fungi in plant roots primarily help in:
1. Nitrogen fixation
2. Phosphate absorption
3. Photosynthesis
4. Bicontrol
1. Nitrogen fixation
2. Phosphate absorption
3. Photosynthesis
4. Bicontrol
Subtopic: Microbes as Biofertilizer |
61%
Level 2: 60%+
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What specific role the symbiotic microbes like Rhizobium play in agriculture?
| 1. | They facilitate nitrogen absorption by the leaves of the plants |
| 2. | They perform biological nitrogen fixation |
| 3. | They carry out denitrification |
| 4. | They enable plants to assimilate nitrogen efficiently |
Subtopic: Microbes as Biofertilizer |
85%
Level 1: 80%+
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