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Class 12 Biology Chapter 10 Microbes In Human Welfare Quiz 5 (46 MCQs)

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1. Find out the examples of Biocontrol agents:
2. Before antibiotics, the first commercial antibacterial available was .....
3. The distillation of the fermented broth is required in the formation ofA. rumB. beerC. brandyD. whisky
4. In the anaerobic sludge digesters, bacteria digest the bacteria and fungi in the sludge. During this digestion, which gas is NOT produced?
5. Fungi are also known to form symbiotic associations with plants (mycorrhiza). Many members of the genus ..... form mycorrhiza.
6. Which is NOT a way in which bacteria are beneficial to humans?
7. Which of the following food items is produced by fermentation by the microbes?A. IdliB. DosaC. ToddyD. Cheese
8. During which stage of sewage treatment microbes are used?
9. A patient brought to a hospital with myocardial infarction is normally immediately given:
10. Baculoviruses are pathogens that attack insects and other arthropods. The majority of baculoviruses used as biological control agents are in the genus:
11. Penicillin's full potential as an effective antibiotic was established by:
12. Besides converting milk to curd, LAB (Lactic Acid Bacteria) also play a beneficial role in:
13. Methanogens grow:
14. Assertion (A):The effluent from the primary settling tank is taken for secondary treatment.Reason (R):Secondary treatment is also known as biological treatment because it involves the use of microbes to consume organic matter.
15. A biocontrol agent to be a part of an integrated pest management should be
16. In sewage treatment, flocs are associated with:
17. High value of BOD indicates that
18. During the digestion of bacteria and fungi in the anaerobic sludge digesters, a mixture of gases is produced. These gases include:
19. The compounds in food (fibers) that induce the growth or activity of beneficial microorganism are called
20. Which one of the following is mainly produced by the activity of anaerobic bacteria on sewage?
21. Microbes are called, microbes because?
22. Antibiotics and what they do are used to treat conditions which of our body systems?
23. What serves as the inoculum?
24. Bottled fruit juices bought from the market are clearer as compared to those made at home. This is because the bottled juices are clarified by the use of:
25. Identify the ODD one out regarding the type of organism:
26. In paddy fields, which organism serves as an important biofertilizer?
27. The sediment produced in the settling tank during secondary sewage treatment is called:
28. Secondary treatment of sewage is mainly a
29. Ethanol can be produced using .....
30. In gobar gas, the maximum amount is that of:
31. Which one of the following helps in the absorption of phosphorus from soil by plants?
32. Saccharomyces cerevisiae is used primarily for
33. Which of the following bacterium produces butyric acid?
34. The semi-solid organic material that comes out of a wastewater treatment plant after completion of the wastewater treatment process is called
35. What is effluent?
36. In Secondary treatment, once the BOD of sewage or waste water is reduced significantly, the effluent is then passed into a:
37. Biogas produced by fermentation of manure, sewage, cattle dung, etc. predominantly comprise
38. Which of the followimg fixes nitrogen in water logged paddy fields?
39. Physical removal of large and small from the sewage through filtration and sedimentation is called:
40. Lactic Acid Bacteria (LAB) grow in milk and convert it to curd. During growth, the LAB produce acids that:
41. Which ministry initiated the Ganga Action Plan?
42. Primary treatment of sewage basically involves:
43. Assertion (A):Use of fertilizers greatly enhance crop productivityReason(R):Irrigation is very important in increasing crop productivity.
44. Toddy is made by fermenting:
45. Antibiotics mostly obtained from
46. In the secondary treatment of sewage, the major part of the activated sludge is pumped into large tanks called:
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