Bihar Board Class 12 (Science) Microbes in Human Welfare — practice questions
70 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice Bihar Board Class 12 (Science) Microbes in Human Welfare in the app →Anabaena and Nostoc are examples of:Milk is converted into curd by which micro-organism?The puffed up appearance of dough is caused by:The yeast used in baking and brewing is:The first antibiotic to be discovered was:Municipal waste water is also called:The gas produced by microbes from dung and used as fuel is:Lactic acid bacteria coagulate milk protein by producing:Penicillin was named after which mould?Cyclosporin A is obtained from which organism?BOD stands for biochemical oxygen:Sewage is treated until its BOD is:Bacteria that produce methane in a biogas plant are called:A common methane producing bacterium is:Biogas made from cattle dung is commonly called:The fungus developed as a biological control for plant disease is:Baculoviruses are used as biological control agents against:Root nodules of legumes are formed by symbiosis with:Cyanobacteria such as Anabaena serve as biofertilisers in:Which predator and pest pairing is used in biological pest control?How do statins lower blood cholesterol?In mycorrhiza formed by Glomus, the fungus mainly supplies the plant with:Which of these fixes atmospheric nitrogen while free-living in soil?Along with IARI, which body developed biogas technology in India?A typical biogas plant has a concrete tank of roughly what depth?Fleming discovered penicillin while working on which bacteria?In primary sewage treatment, all the solids that settle form the:Which ministry initiated the Ganga Action Plan?Besides phosphorus uptake, plants with mycorrhiza also show:Cyanobacteria serve as an important biofertiliser in which fields?A common methanogen that grows anaerobically on cellulose is:The spent slurry removed from a biogas plant can be used as:Which group of bacteria converts milk into curd?Which vitamin content of milk rises when it is converted to curd?Which gas makes the dough for idli and dosa puff up on fermentation?Which microbe is used to ferment dough for making bread?Roquefort cheese gets its particular flavour from ripening with what?What are the very large vessels used for industrial microbial growth called?Which yeast is used for fermenting malted cereals and fruit juices to make ethanol?Which pair of beverages is produced without distillation?Which of these drinks is obtained by distilling a fermented broth?What are antibiotics, in microbiological terms?Alexander Fleming noticed a mould inhibiting growth of which bacteria?Who established the full potential of penicillin as an effective antibiotic?In which year did Fleming, Chain and Florey share the Nobel Prize for penicillin?Which fungus is used for commercial production of citric acid?Which bacterium is used to produce acetic acid commercially?Butyric acid is produced industrially by which bacterium?Which acid is made commercially with the help of Lactobacillus?Commercial production of ethanol relies on which organism?Which bacterial product is used as a clot buster after a heart attack?Cyclosporin A, an immunosuppressant for organ transplants, comes from which fungus?Blood-cholesterol lowering statins are produced by which yeast?Sewage treatment is done by which kind of microbes?In primary sewage treatment, what is the settled solid material called?What does the supernatant of the primary settling tank form?The primary effluent is passed to which units for biological treatment?In aeration tanks, which microbes grow vigorously into flocs?What does the abbreviation BOD stand for?What is the sediment of bacterial flocs in the settling tank called?Which action plan was started to save a major river of India from pollution?Biogas is a mixture of gases that predominantly contains which gas?Which is a common methanogenic bacterium?In cattle, methanogens help in digestion in which part of the stomach?What is fed into the tank of a biogas plant?Which two organisations mainly developed biogas technology in India?What does biocontrol mean?Which bacterium is used as a microbial biocontrol agent against butterfly caterpillars?Which crop carries Bt toxin genes introduced by genetic engineering?Most baculoviruses used as biocontrol agents belong to which genus?