For retting of Jute, the fermenting microbe used is:
1. Methophilic bacteria
2. Helicobacter pylori
3. Butyric acid bacteria
4. Streptococcus lactin
Which of the following yields citric acid?
1. Penicillium citrinum
2. Aspergillus niger
3. Saccharomyces
4. Azospirillium
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