Class XII · Biology practice
Microbes in Human Welfare MCQs
Check your understanding, bookmark questions and revisit your mistakes.
455 questions in this collection · Page 2 of 46
Question 11 of 455
📘 CLASS XII
Microbes In Human Welfare
Roquefort cheese acquires its particular flavour because it is ripened by growing:
The “Roquefort cheese” are ripened by growing a specific fungi on them, which gives them a particular flavour.
Question 12 of 455
📘 CLASS XII
Microbes In Human Welfare
In industrial production, microbes are grown in very large vessels called:
Production on an industrial scale requires growing microbes in very large vessels called fermentors.
Question 13 of 455
📘 CLASS XII
Microbes In Human Welfare
Bottled fruit juices are clearer than homemade juices due to the industrial use of which enzymes?
Bottled juices are clarified by the use of pectinases and proteases.
Question 14 of 455
📘 CLASS XII
Microbes In Human Welfare
Streptokinase, produced by the bacterium *Streptococcus*, is genetically modified and used medically as a:
Streptokinase is used as a ‘clot buster’ for removing clots from the blood vessels of patients who have undergone myocardial infarction.
Question 15 of 455
📘 CLASS XII
Microbes In Human Welfare
Cyclosporin A, an immunosuppressive agent used in organ-transplant patients, is produced by the fungus:
Cyclosporin A is produced by the fungus Trichoderma polysporum.
Question 16 of 455
📘 CLASS XII
Microbes In Human Welfare
Statins, used as blood-cholesterol lowering agents, are commercially produced by which yeast?
Statins produced by the yeast Monascus purpureus have been commercialised as blood-cholesterol lowering agents.
Question 17 of 455
📘 CLASS XII
Microbes In Human Welfare
Statins act by competitively inhibiting the enzyme responsible for the synthesis of:
Statins act by competitively inhibiting the enzyme responsible for synthesis of cholesterol.
Question 18 of 455
📘 CLASS XII
Microbes In Human Welfare
Municipal waste-water containing large amounts of organic matter and microbes, many of which are pathogenic, is commonly called:
This municipal waste-water is also called sewage.
Question 19 of 455
📘 CLASS XII
Microbes In Human Welfare
The treatment of waste water in STPs is carried out by microbes which are naturally present in the sewage and are classified as:
Treatment of waste water is done by the heterotrophic microbes naturally present in the sewage.
Question 20 of 455
📘 CLASS XII
Microbes In Human Welfare
Primary sewage treatment involves which basic steps?
Primary treatment steps basically involve physical removal of particles—large and small—from the sewage through filtration and sedimentation.
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