Short Answer TypeList the events that reduce the Biological Oxygen Demand (BOD) of a primary effluent during sewage treatment.
Given below is a list of six micro-organism. State their usefulness to humans.
(a) Nucleopolyhedrovirus
(b) Saccharomyces cervisiae
(c) Monascus purpureus
(d) Trichoderma polysporum
(e) Peniciliu notatum.
(f) Propionibacterium sharmanni
Name the genus to which baculoviruses belong. Describe, their role in the integrated pest management programmes.
Name the microbes that help production of the following products commercially : (a) Statin (b) Citric acid (c) Penicillin (d) Butyric acid
Your advice is sought to improve the nitrogen content of the soil to use for cultivation of a non-leguminous terrestrial crop.
(a) Recommend two microbes that can enrich the soil with nitrogen.
(b) Why do leguminous crops not require such enrichment of the soil?
(a) Azospirillum, Azotobacter, Anabaena, Oscillatoria, etc.
(b) Leguminous crops have a symbiotic association with Rhizobium bacteria which traps N2 directly from the atmosphere and provides it to the plant and in turn gets food and shelter.
Organic farmers prefer the biological control of diseases and pests of the use of chemicals for the same purpose. Justify.
Multiple Choice QuestionsMatch the following list of microbes and their importance:
| (a) | Sacharomyces cerevisiae | (i) | Production of immunosuppressive agents |
| (b) | Monascus purpureus | (ii) | Riperuing of Swiss cheese |
| (c) | Trichoderma polysporum | (iii) | Commercial production of ethanol |
| (d) | Propionibacterium sharmanii | (iv) | Production of blood cholesterol lowering agents |
Codes
A B C D
3 4 1 2
A B C D
4 3 2 1
A B C D
4 2 1 3
A B C D
4 2 1 3
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