Bihar Board - Class 12 Biology-Chapter 10:Microbes in Human Welfare Multiple Choice Questions
The multiple choice questions for Chapter 10:Microbes in Human Welfare of Class 12 Chemistry are provided here in English. These questions are based on the NCERT curriculum for Class 12. They are designed to help students assess their understanding of the key concepts covered in the chapter. These multiple choice questions will be useful not only for the Class 12 board exams but also for entrance exams like NEET. The questions for Bihar Board Class 12 Chemistry, Chapter 10:Microbes in Human Welfare, have been prepared by expert teachers at Vidyakul.
Multiple Choice Question
1. For retting of jute, the fermenting microbe is-
(a) Thermophilic bacteria
(b) Butyric acid bacteria
(c) Helicobacter Pylori
(d) Streptococcus Lactis
Answer:b
2. Usnic acid in an antibiotic obtained from-
(a) Fungi
(b) Bacteria
(c) Lichens
(d) Algae
Answer:c
3. Which one single organism or the pair of organisms is correctly assigned to its or their named taxonomic group
(a) Paramecium and Plasmodium belong to the same kingdom as that of Penicillium
(b) Lichen is a composite organism formed from the symbiotic association of an algae and a protozoan
(c) yeast used in making bread and beer is a fungus
(d) Nostoc and Anabaena are examples of protista
Answer:c
4. Ethanol is commercially produced through a particular species of
(a) Aspergillus
(b) Saccharomyces
(c) Clostridium
(d) Trichoderma
Answer:b
5. Monascus purpureus is a yeast used commercially in the production of:
(a) ethanol
(b) streptokinase for removing clots from the blood vessels,
(c) Citric acid
(d) blood cholesterol lowering statins
Answer:d
6. Yeast is used in the production of
(a) Citric acid and lactic acid
(b) Lipase and pectinase
(c) Bread and beer
(d) Cheese and butter
Answer:c
7. The pathogen Microsporum responsible for ringworm disease in humans belongs to the same Kingdom of organisms as that of
(a) Rhizopus, a mold
(b) Ascaris, a roundworm
(c) Taenia, a tapeworm
(d) Wuchereria, a filarial worm
Answer:a
8. The gas responsible for puffing-up appearance of dough comes from -
(a) aerobic respiration
(b) fermentation
(c) photosynthesis
(d) photorespiration
Answer:b
9. In cheese manufacture, the microorganisms are used for-
(a) the souring of milk only
(b) the ripening only
(c) development of resistance to spoilage
(d) Both a and b
Answer:d
10. Which one(s) is/are correct about Cyclosporin A?
(a) It is produced by the fungus Trichoderma polysporum
(b) It is used as an immunosuppressive agent during organ transplantation
(c) It is produced by a type of yeast, Monascus purpureus
(d) Both a and b
Answer:d
