Q. No.Which one of the following pairs is wrongly matched?
1. Methanogens - Gobar gas
2. Yeast - Ethanol
3. Streptomycetes - Antibiotic
4. Coliforms - Vinegar
Curing of tea leaves is brought by the activity of:
1. bacteria
2. mycorrhiza
3. viruses
4. fungi
Besides dung, the weed that can be used in biogas production is:
1. Hydrilla
2. Solanum nigrum
3. Eichhornia Crassipes
4. Parthenium hysterophorus
1. Fungi
2. Lichen
3. Phytoplankton’s
4. None of the above
Which of the following can be used as biocontrol agent in the treatment of plant disease?
1. Lactobacillus
2. Trichoderma
3. Chlorella
4. Anabaena
Select the correct group of biocontrol agents:
1. Nostoc, Azospirillum, Nucleopolyhedrovirus
2. Bacillus thuringiensis. Tobacco mosaic virus, Aphids
3. Trichoderma, Baculovirus, Bacillus thuringiensis
4. Oscilatoria, Rhizobium, Trichoderma
Match the following :
|
(a) |
Lactobacillus |
(i) |
Cheese |
|
(b) |
Saccharomyces cerevisiae |
(ii) |
Curd |
|
(c) |
Aspergillus niger |
(iii) |
Citric Acid |
|
(d) |
Acetobacter aceti |
(iv) |
Bread |
|
(v) |
Acetic acid |
Select the correct option:
| Options: | (a) | (b) | (c) | (d) |
| 1. | (ii) | (i) | (iii) | (v) |
| 2. | (ii) | (iv) | (v) | (iii) |
| 3. | (ii) | (iv) | (iii) | (v) |
| 4. | (iii) | (iv) | (v) | (i) |
During sewage treatment, biogases are produced which include :
1. Methane,oxygen, hydrogen sulphide
2. Hydrogen sulphide, methane, sulphur dioxide
3. Methane, hydrogen sulphide, carbon dioxide
4. Hydrogen sulphide, nitrogen, methane
All are correct with respect to BOD (Biochemical oxygen Demand), except
1. It refers to the amount of oxygen that would be consumed if all the organic matter in one liter of water were oxidized by bacteria
2. The BOD test is a measure of the organic matter present in the water
3. The greater the BOD of waste water, less is its polluting potential
4. Waste water is treated till BOD is reduced significantly
What are flocs?
(1) Masses of anaerobic bacteria
(2) Masses of aerobic fungi only
(3) Masses of anaerobic bacteria and fungi
(4) Masses of aerobic bacteria associated with fungal filaments
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