Global MCQ Practice

🌐 Total MCQ
🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books

Class 12 Biology Chapter 10 Microbes In Human Welfare Quiz 1 (60 MCQs)

Quiz Instructions

Select an option to see the correct answer instantly.

1. Which one of the following helps in the absorption ofphosphorus from the soil by plants?
2. The Ganga and Yamuna action plan was launched in ..... respectively.
3. Biofertilizers are organisms that:
4. Antibiotic resistance is accelerated by
5. The bacteria that grow on milk and convert it into curd
6. Large holes in Swiss cheese is due to the production of large amount of carbon-di-oxide by the bacterium
7. Ethanol is commercially produced through a particular species of
8. The vitamin whose content increases following the conversion of milk into curd by lactic acid bacteria is
9. Which one of the following is not used in organic farming?
10. Which of the following bacteria help in nitrogen fixation from atmosphere?A. AzotobacterB. RhizobiumC. AzospirillumD. Lactobacillus
11. Why is wine distilled?
12. What does a high value of BOD(Biochemical Oxygen Demand) indicate?
13. The mixture of gases released during anaerobic digestion of sludge is called
14. The symbiotic association between fungi and roots of higher plants is called
15. The free-living fungus Trichoderma can be used for:
16. Identify the source of statins:
17. In cheese manufacture, the micro-organisms are used for-
18. Antibiotics are the most effective on:
19. The grit (soil and small pebbles) are removed by
20. The remaining major part of activated sludge is pumped into large tanks called .....
21. Identify the source of Acetic acid:
22. Trichoderma species are free living ..... that are very common in the root ecosystems.
23. Apids are controlled by
24. Identify the pair where both organisms are FUNGI:
25. For the production of beverages and antibiotics on an industrial scale, microbes are grown in very large vessels called:
26. A common biocontrol agent for the control of the plant diseases, is
27. Which of the following cyanobacteria can fix atmospheric nitrogen?A. NostocB. AnabaenaC. OscillatoriaD. Yeast
28. The BOD test measures the rate of uptake of oxygen by micro-organisms in a sample of water. Indirectly, BOD is a measure of:
29. Citric acid is produced by-
30. The source of the enzyme Streptokinase is:
31. A bioactive compound used as clot buster for removing blood clots from blood vessels:
32. Fungi which form symbiotic associations with plants are .....
33. In the mycorrhizal association, the fungal symbiont absorbs phosphorus from soil and passes it to the plant. What other benefits does the plant derive?
34. Which of the following show the competitive inhibition in the pathway of cholesterol synthesis?
35. Which one controls the growth of strangler vine in citrus crops.
36. Yeast is an important source of
37. Conversion of milk to curd improves its nutritional value by increasing the amount of (a) vitamin D (b) vitamin A(c) vitamin B12 (d) vitamin E
38. 'Toddy', a traditional drink of some parts of southern India, is made by fermenting:
39. Bacillus thuringiensis is used for
40. The technology of biogas production from cow dung was developed inIndia largely due to the efforts of:
41. What are some examples of food made by fungi
42. What is a beneficial relationship between a plant and a fungus called?
43. Which of the following antibiotics was discovered first?
44. The organism used to digest polyurethane is a
45. Which of the following microbes are used for the commercial production of citric acid?
46. Match the bioactive molecule with its source and function:
47. Trichoderma is an effective biocontrol agent for:
48. Scientists have introduced ..... gene into plants to impart resistance to insect pests.
49. Assertion (A):Biogas is used as fuel for cooking and lightingReason(R):It is considered as ecofriendly and pollution free source of energy
50. ..... serve as an important bio-fertilizer in paddy fields.
51. Which step of sewage treatment involves "Sequential Filtration and Sedimentation" ?
52. Which of the following can be used as a biocontrol agent in the treatment of plant disease?
53. Which one of the following alcoholic drink is produced without distillation?
54. Alexander Fleming discovered Penicillin while working on:
55. Big holes in Swiss cheese are made by a:
56. Methanobacterium is found in:
57. Acinetobacter baumannii is a .....
58. The significance of Flocs in secondary Treatment is not
59. What is produced in the digesters?
60. Streptokinase is isolated from
🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books