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Q. No.During secondary treatment of sewage water:
I:
vigorous growth of useful aerobic microbes into flocs is allowed
II:
aerobic microbes consume the major part of the organic matter in the effluent.
III:
the BOD of the water sample gets significantly increased
1.
Only I and II are correct
2.
Only I is correct
3.
Only II and III are correct
4.
I, II and III are correct
Subtopic: Microbes in Sewage Treatment |
68%
From NCERT
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Identify the incorrectly matched pair:
| Bio-control agent | Pest controlled | |
| 1. | Lady bird | Aphids |
| 2. | Dragon fly | Mosquito |
| 3. | Trichoderma | Fungi |
| 4. | Baculoviruses | Nematodes |
Subtopic: Microbes in Biocontrol Agent |
66%
From NCERT
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Identify the correct statement:
| 1. | Roquefort cheese is ripened by a growing a specific bacterium on them |
| 2. | LAB improves the nutritional quality of curd by increasing Vitamin A |
| 3. | Aspergillus niger is used for commercial production of citric acid |
| 4. | Statins are used to lower blood glucose levels in IDDM |
Subtopic: Chemicals, Enzymes & Other Bioactive Molecules |
86%
From NCERT
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All the following are correct regarding Methanogens except:
| 1. | They can grow anaerobically on cellulosic material |
| 2. | They can produce large amounts of methane along with carbon dioxide and hydrogen |
| 3. | They can be found in anaerobic sludge during sewage treatment and in rumen of cattle |
| 4. | They are true bacteria and are chemoheterotrophs |
Subtopic: Microbes in Sewage Treatment |
81%
From NCERT
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Which of the following does not involve a fungus?
1. Commercial production of ethanol
2. Commercial production of citric acid
3. Commercial production of statins
4. Commercial production of streptokinase
1. Commercial production of ethanol
2. Commercial production of citric acid
3. Commercial production of statins
4. Commercial production of streptokinase
Subtopic: Chemicals, Enzymes & Other Bioactive Molecules |
65%
From NCERT
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Glomus is:
| 1. | the genus of fungus, the members of which help symbiont plants get phosphorus |
| 2. | the genus of fungus, the members of which help symbiont plants get nitrogen |
| 3. | the genus of plants, the members of which are symbionts of mycorrhizae |
| 4. | the genus of fungus, the members of which help processing of certain varieties of cheese |
Subtopic: Microbes as Biofertilizer |
65%
From NCERT
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Which vitamin, important for effective erythropoiesis, is added by LAB when it is used to convert milk into curd?
1. Vitamin D
2. Vitamin A
3. Vitamin B12
4. Vitamin E
1. Vitamin D
2. Vitamin A
3. Vitamin B12
4. Vitamin E
Subtopic: Microbes in Household Products |
97%
From NCERT
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Citric acid, widely used in the food industry, can be commercially produced with the help of the microbe:
| 1. | Propionibacterium shermanii |
| 2. | Aspergillus niger |
| 3. | Xanthomonas citri |
| 4. | Colletotrichum falcatum |
Subtopic: Chemicals, Enzymes & Other Bioactive Molecules |
91%
From NCERT
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Identify the incorrectly matched pair:
| 1. | Cyclosporin A | Immuno-suppressant from Trichoderma polysporum |
| 2. | Statins | Blood cholesterol lowering agents from Monascus purpureus |
| 3. | Streptokinase | Clot buster from Staphylococcus aureus |
| 4. | Penicillium notatum | Source of antibiotic discovered by Fleming |
Subtopic: Industrial Products, Beverages & Antibiotics | Chemicals, Enzymes & Other Bioactive Molecules |
84%
From NCERT
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In biological nitrogen fixation by microbes:
I. Rhizobium fixes nitrogen in the root nodules of leguminous plants
II. Frankia fixes nitrogen in the root nodules of non-leguminous [actinorrhizal] plants
III. Mycorrhiza are symbiotic relation between vascular plants and fungi [genus Glomus] that help plants absorb minerals like phosphorus
IV. Cyanobacteria [Anabaena, Nostoc and Oscillatoria] serve as important biofertlizers in paddy fields
1. Only I, II and III are correct
2. Only I, II and IV are correct
3. Only II, III and IV are correct
4. I, II, III and IV are correct
I. Rhizobium fixes nitrogen in the root nodules of leguminous plants
II. Frankia fixes nitrogen in the root nodules of non-leguminous [actinorrhizal] plants
III. Mycorrhiza are symbiotic relation between vascular plants and fungi [genus Glomus] that help plants absorb minerals like phosphorus
IV. Cyanobacteria [Anabaena, Nostoc and Oscillatoria] serve as important biofertlizers in paddy fields
1. Only I, II and III are correct
2. Only I, II and IV are correct
3. Only II, III and IV are correct
4. I, II, III and IV are correct
Subtopic: Microbes as Biofertilizer |
77%
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