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?
Organic farmers prefer the biological control of diseases and pests of the use of chemicals for the same purpose. Justify.
Biological pest control has important advantages compared to chemical pest control, such as being safer for humans and the environment.
Chemical methods often kill both useful and harmful life forms indiscriminately. Eradication of the creatures that are often described as pests in not only possible but also undesirable for without them the beneficial predatory and parasitic insects which depend upon them as food or hosts would not be able to survive.
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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