In the given diagram, the gas X can be:
1. | Hydrogen sulfide | 2. | Carbon monoxide |
3. | Ammonia | 4. | Oxygen |
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
Methanogenic bacteria are not found in:
1. rumen of cattle
2. gobar gas plant
3. bottom of water-logged paddy fields
4. activated sludge
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
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 |
Which one of the following is not a nitrogen-fixing organism?
1. | Anabaena | 2. | Nostoc |
3. | Azotobacter | 4. | Pseudomonas |
Methanogens do not produce:
1. | oxygen | 2. | methane |
3. | hydrogen sulfide | 4. | carbon dioxide |
During which stage of the sewage treatment are the microbes used?
1. | Primary | 2. | Secondary |
3. | Tertiary | 4. | Quaternary |
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 |
‘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 |