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Q. No.Which one of the following is not a nitrogen-fixing organism?
1.
Anabaena
2.
Nostoc
3.
Azotobacter
4.
Pseudomonas
Subtopic: Microbes as Biofertilizer |
89%
Level 1: 80%+
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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 |
Subtopic: Microbes as Biofertilizer |
87%
Level 1: 80%+
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Subtopic: Microbes in Production of Biogas |
89%
Level 1: 80%+
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What would happen if oxygen availability to activated sludge flocs is reduced?
| 1. | It will slow down the rate of degradation of organic matter. |
| 2. | The center of flocs will become anoxic, which would cause the death of bacteria and eventually breakage of flocs. |
| 3. | Flocs would increase in size as anaerobic bacteria would grow around flocs. |
| 4. | Protozoa would grow in large numbers. |
Subtopic: Microbes in Sewage Treatment |
51%
Level 3: 35%-60%
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During which stage of the sewage treatment are the microbes used?
| 1. | Primary | 2. | Secondary |
| 3. | Tertiary | 4. | Quaternary |
Subtopic: Microbes in Sewage Treatment |
92%
Level 1: 80%+
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Biogas is a mixture of:
| 1. | Methane, Carbon dioxide, and Hydrogen sulfide |
| 2. | Methane, Carbon dioxide, and Ammonia |
| 3. | Methane, Ammonia, and Hydrogen sulfide |
| 4. | Ammonia, Carbon dioxide, and Hydrogen sulfide |
Subtopic: Microbes in Production of Biogas |
91%
Level 1: 80%+
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‘Toddy’, a traditional drink of some parts in southern India, is made by fermenting sap from:
| 1. | Soyabean | 2. | Bamboo shoots |
| 3. | Palms | 4. | Sugarcane |
Subtopic: Industrial Products, Beverages & Antibiotics | Chemicals, Enzymes & Other Bioactive Molecules |
88%
Level 1: 80%+
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Subtopic: Industrial Products, Beverages & Antibiotics | Chemistry of Fermented Beverages |
82%
Level 1: 80%+
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With reference to human beings, antibiotics are actually:
| 1. | Anti life | 2. | Pro-life |
| 3. | Irrelevant to life | 4. | Defining life |
Subtopic: Chemicals, Enzymes & Other Bioactive Molecules |
85%
Level 1: 80%+
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Which of the following human diseases cannot be treated by antibiotics?
| 1. | Plague | 2. | Diphtheria |
| 3. | Leprosy | 4. | Mumps |
Subtopic: Chemicals, Enzymes & Other Bioactive Molecules |
81%
Level 1: 80%+
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