The rising of dough is due to:
1. Multiplication of yeast
2. Production of CO2
3. Emulsification
4. Hydrolysis of wheat flour starch into sugars
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Methanogenic bacteria are not found in:
1. rumen of cattle
2. gobar gas plant
3. bottom of water-logged paddy fields
4. activated sludge
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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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Methanogens do not produce:
1. | oxygen | 2. | methane |
3. | hydrogen sulfide | 4. | carbon dioxide |
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During which stage of the sewage treatment are the microbes used?
1. | Primary | 2. | Secondary |
3. | Tertiary | 4. | Quaternary |
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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 |
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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 |
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The ‘Roquefort cheese’ is ripened by:
1. | A fungus | 2. | A bacterium |
3. | An algae | 4. | Lichens |
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