Class XII · Biology practice
Microbes in Human Welfare MCQs
Check your understanding, bookmark questions and revisit your mistakes.
455 questions in this collection · Page 17 of 46
Question 161 of 455
📘 CLASS XII
Microbes In Human Welfare
The common rod-shaped bacterium depicted in Figure 8.1 (c) also features an appendage used for motility called:
Figure 8.1 (c) shows a rod-shaped bacterium showing flagella.
Question 162 of 455
📘 CLASS XII
Microbes In Human Welfare
What is the name of the traditional drink made by fermentation of palm sap in southern India?
‘Toddy’, a traditional drink of some parts of southern India is made by fermenting sap from palms.
Question 163 of 455
📘 CLASS XII
Microbes In Human Welfare
If you classify the organisms that produce beer (without distillation) and whisky (with distillation), they fall under the category of:
Microbes... have been used for the production of beverages like wine, beer, whisky, brandy or rum.
Question 164 of 455
📘 CLASS XII
Microbes In Human Welfare
The significance of the discovery of antibiotics is highlighted by their being regarded as one of the most significant discoveries of which century?
Antibiotics produced by microbes are regarded as one of the most significant discoveries of the twentieth century.
Question 165 of 455
📘 CLASS XII
Microbes In Human Welfare
Who among the following was NOT credited with establishing the full potential of penicillin or receiving the Nobel Prize for its discovery?
Alexander Fleming, Ernest Chain, and Howard Florey were awarded the Nobel Prize in 1945.
Question 166 of 455
📘 CLASS XII
Microbes In Human Welfare
The commercial production of ethanol relies on the yeast Saccharomyces cerevisiae, which is the same microbe used for making:
Yeast (Saccharomyces cerevisiae) is used for commercial production of ethanol. This is the same yeast used for bread-making.
Question 167 of 455
📘 CLASS XII
Microbes In Human Welfare
Which product is used as an immunosuppressive agent in organ-transplant patients?
Another bioactive molecule, cyclosporin A, that is used as an immunosuppressive agent in organ-transplant patients.
Question 168 of 455
📘 CLASS XII
Microbes In Human Welfare
What is the name given to the municipal waste-water generated every day in cities and towns?
This municipal waste-water is also called sewage.
Question 169 of 455
📘 CLASS XII
Microbes In Human Welfare
What is the term for the large vessels required for growing microbes on an industrial scale?
Production on an industrial scale, requires growing microbes in very large vessels called fermentors.
Question 170 of 455
📘 CLASS XII
Microbes In Human Welfare
The secondary effluent, after BOD reduction and sedimentation, is generally released into:
The effluent from the secondary treatment plant is generally released into natural water bodies like rivers and streams.
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