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CBSE - Class 12 > Biology > Microbes in Human Welfare Worksheets

Free CBSE - Class 12 Biology - Microbes in Human Welfare worksheets

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1.
Find out the name of the microbes from which Cyclosporin (A) (an immunosuppressive drug) and Statins (blood cholesterol lowering agents) are obtained.
2.
Find out the role of microbes in the following and discuss it with your teacher.
(a) Single cell protein (SCP)
3.
Find out the role of microbes in the following and discuss it with your teacher.
(b) Soil
4.
Arrange the following in the decreasing order (most important first) of their importance, for the welfare of human society. Give reasons for your answer.
Biogas, Citric acid, Penicillin and Curd
5.
How do biofertilisers enrich the fertility of the soil?
6.
Bacteria cannot be seen with the naked eyes, but these can be seen with the help of a microscope. If you have to carry a sample from your home to your biology laboratory to demonstrate the presence of microbes with the help of a microscope, which sample would you carry and why?
7.
Name some traditional Indian foods made of wheat, rice and Bengal gram (or their products) which involve use of microbes.
8.
Do you think microbes can also be used as source of energy? If yes, how?
9.
Microbes can be used to decrease the use of chemical fertilisers and pesticides. Explain how this can be accomplished.
10.
Three water samples namely river water, untreated sewage water and secondary effluent discharged from a sewage treatment plant were subjected to BOD test. The samples were labelled (A), (B) and (C); but the laboratory attendant did not note which was which. The BOD values of the three samples (A), (B) and (C) were recorded as (20mg/L), (8mg/L) and (400mg/L), respectively. Which sample of the water is most polluted? Can you assign the correct label to each assuming the river water is relatively clean?
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Chapters in CBSE - Class 12 Biology

Biodiversity and Conservation Worksheet Biotechnology and Its Applications Worksheet Biotechnology: Principles and Processes Worksheet Ecosystem Worksheet Environmental Issues Worksheet Evolution Worksheet Human Health and Disease Worksheet Human Reproduction Worksheet Molecular Basis of Inheritance Worksheet Organisms and Populations Worksheet Principles of Inheritance and Variation Worksheet Reproduction in Organisms Worksheet Reproductive Health Worksheet Strategies for Enhancement in Food Production Worksheet

Free Microbes in Human Welfare Worksheets

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