Saccharomyces cerevisiae is used in the formation of:
1. Ethanol
2. Methanol
3. Acetic acid
4. Antibiotics
Modern farmers can increase the yield of Paddy up to 50% by the use of:
1. Cyanobacteria
2. Rhizobium
3. Cyanobacteria in Azolla pinnata
4. Farm yard manure
The most thoroughly studied of the known bacteria-plant interactions is the:
1. | Gall formation on certain angiosperms by Agrobacterium |
2. | Nodulation of Sesbania stems by nitrogen-fixing bacteria |
3. | Plant growth stimulation by phosphate– solubilising bacteria |
4. | Cyanobacterial symbiosis with some aquatic ferns |
The dough kept overnight in warm weather becomes soft and spongy because of:
1. Fermentation
2. Cohesion
3. Osmosis
4. Absorption of carbon dioxide from the atmosphere
Which one of the following pairs is not correctly matched:
1. Serratia – Drug addiction
2. Spirulina – Single-cell protein
3. Rhizobium – Biofertilizer
4. Streptomyces – Antibiotic
A major component of gobar gas is:
1. Methane
2. Ethane
3. Butane
4. Ammonia
A free-living nitrogen-fixing cyanobacterium that can also form a symbiotic association with the water fern Azolla is:
1. Chlorella
2. Nostoc
3. Anabaena
4. Tolypothrix
Common indicator organism of water pollution is:
1. Eichhornia crassipes
2. Escherichia coli
3. Entamoeba histolytica
4. Lemna pancicostata
Azolla is used in the cultivation of:
1. | Maize | 2. | Sorghum |
3. | Wheat | 4. | Rice |
Which one produces gas by decomposing the gobar (Dung) in gobar gas:
1. Fungus
2. Virus
3. Methanogenic bacteria
4. Algae