Class XII · Biology practice
Microbes in Human Welfare MCQs
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455 questions in this collection · Page 42 of 46
Question 411 of 455
📘 CLASS XII
Microbes In Human Welfare
The increase in plant growth associated with mycorrhiza is partly due to the overall increase in plant growth and ____.
Overall increase in plant growth and development.
Question 412 of 455
📘 CLASS XII
Microbes In Human Welfare
The conversion of milk to curd is a result of ____ produced by LAB that coagulate milk proteins.
During growth, the LAB produce acids that coagulate and partially digest the milk proteins.
Question 413 of 455
📘 CLASS XII
Microbes In Human Welfare
Antibiotics are considered ‘pro life’ with reference to ____.
With reference to human beings, they are ‘pro life’.
Question 414 of 455
📘 CLASS XII
Microbes In Human Welfare
The gas that produces the large holes in Swiss cheese is ____.
The large holes in ‘Swiss cheese’ are due to production of a large amount of CO2.
Question 415 of 455
📘 CLASS XII
Microbes In Human Welfare
Microbes that are only microscopic include viruses, viroids, and ____.
Viruses, viroids and also prions are generally considered only microscopic.
Question 416 of 455
📘 CLASS XII
Microbes In Human Welfare
The use of Streptokinase as a clot buster is for removing clots from the blood vessels of patients who have undergone ____.
Streptokinase is used as a ‘clot buster’ for removing clots from the blood vessels of patients who have undergone myocardial infarction.
Question 417 of 455
📘 CLASS XII
Microbes In Human Welfare
The waste water generated daily in cities and towns is referred to as municipal waste water or ____.
This municipal waste-water is also called sewage.
Question 418 of 455
📘 CLASS XII
Microbes In Human Welfare
The secondary treatment of sewage is termed biological treatment because it uses ____ microbes naturally present in the sewage.
Treatment of waste water is done by the heterotrophic microbes naturally present in the sewage.
Question 419 of 455
📘 CLASS XII
Microbes In Human Welfare
The greater the BOD of waste water, the more is its ____ potential.
The greater the BOD of waste water, more is its polluting potential.
Question 420 of 455
📘 CLASS XII
Microbes In Human Welfare
Biogas is a mixture of gases produced by ____ activity.
Biogas is a mixture of gases... produced by the microbial activity.
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