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455 questions in this collection · Page 16 of 46
Question 151 of 455
📘 CLASS XII
Microbes In Human Welfare
The fungus Penicillium notatum is the source of Penicillin. The bacteria Streptococcus is the source of:
Streptokinase produced by the bacterium Streptococcus.
Question 152 of 455
📘 CLASS XII
Microbes In Human Welfare
Which microbe is crucial in synthesizing the immunosuppressive agent Cyclosporin A?
Cyclosporin A... is produced by the fungus Trichoderma polysporum.
Question 153 of 455
📘 CLASS XII
Microbes In Human Welfare
Which microbe is responsible for lowering blood-cholesterol levels by producing Statins?
Statins produced by the yeast Monascus purpureus.
Question 154 of 455
📘 CLASS XII
Microbes In Human Welfare
Primary treatment effluent is defined as the supernatant formed after the sedimentation of:
All solids that settle form the primary sludge, and the supernatant forms the effluent.
Question 155 of 455
📘 CLASS XII
Microbes In Human Welfare
In the context of sewage treatment, what is the fate of the remaining major part of the activated sludge?
The remaining major part of the sludge is pumped into large tanks called anaerobic sludge digesters.
Question 156 of 455
📘 CLASS XII
Microbes In Human Welfare
Methanogens are bacteria that are also present in which specific part of the cattle’s digestive system?
These bacteria are also present in the rumen (a part of stomach) of cattle.
Question 157 of 455
📘 CLASS XII
Microbes In Human Welfare
The use of chemical weedicides leads to the pollution of:
Our soil is also polluted through our use of weedicides to remove weeds.
Question 158 of 455
📘 CLASS XII
Microbes In Human Welfare
Why does the organic farmer generally believe that the eradication of pests is undesirable?
Without them [pests] the beneficial predatory and parasitic insects which depend upon them as food or hosts would not be able to survive.
Question 159 of 455
📘 CLASS XII
Microbes In Human Welfare
What is the significance of the fungus Trichoderma species being free-living in root ecosystems?
Trichoderma species are free-living fungi that are very common in the root ecosystems. They are effective biocontrol agents of several plant pathogens.
Question 160 of 455
📘 CLASS XII
Microbes In Human Welfare
Which free-living bacteria enrich the soil by fixing atmospheric nitrogen?
Other bacteria can fix atmospheric nitrogen while free-living in the soil (examples Azospirillum and Azotobacter).