Microbes in Human Welfare is a topic which is frequently asked in the National Eligibility cum Entrance Test (NEET). Candidates who are preparing for National eligibility cum Entrance Test (NEET) this year should be very familiar with this topic. Here we are attaching Microbes in Human Welfare NEET Questions and Answers PDF . This is an important topic so you must have to give your best shot in this topic. We hope these NEET Questions will help you a lot.”
Microbes in Human Welfare NEET Questions and Answers PDF
1. To which BOD is related?
(A) Microbes and organic matters
(B) Organic compound
(C) Microbes
(D) None of them
Answer: Organic compound
2. Which organism is useful to produce Riboflavin?
(A) Arabia hossipae
(B) Saccharhomyces Cervisiae
(C) (a) & (b) both
(D) None of them
Answer: Arabia hossipae
3. Bacillus thuringiensis is useful in….
(A) Bio fertiliser
(B) Biometalogical
(C) Biotoxic plant
(D) Bio product plant
Answer: Biotoxic plant
4. Bio fertilizer means
(A) Crop which shows rapid growth
(B) Cow dung and agricultural west
(C) prepared by Anabaena and Nostoc
(D) None of them
Answer: prepared by Anabaena and Nostoc
5. Which is useful to control Nematodes in cereal crops ?
(A) Bionematocides
(B) Fungicides
(C) Weedicides
(D) Insecticides
Answer: Weedicides
6. Which sentence is odd ?
(A) Progesteron is useful as a immuno suppressor
(B) Statins is useful to reduce cholesterol
(C) Streptokinase is useful to prevent blood clotting
(D) Lipase is useful to remove oily stains
Answer: Progesteron is useful as a immuno suppressor
7. Which micro organism is involved in flocs as well as in mychorrhiza ?
(A) Bacteria
(B) Virus
(C) Fungus
(D) Algae
Answer: Fungus
8. Which is used to prevent blood clotting in blood vessels ?
(A) Steroids
(B) Cyclosporin-A
(C) Streptokinase
(D) Statins
Answer: Streptokinase
9. Which is to be used in production of swiss cheese ?
(A) Monascus purpureus
(B) Clostridium bacterium
(C) Lacto Bacillus
(D) Saccharhomyces cerevisiae
Answer: Clostridium bacterium
10. Which option is related with the utility of lectic acid ?
(A) In fermantation, to prepare pickle
(B) useful for preparing curd from milk
(C) To increase the quality of vitamin B12
(D) All the given
Answer: All the given
11. Cheese is a product of:
(A) Distillation
(B) Fermentation
(C) Pasteurisation
(D) Dehydration
Answer: Fermentation
12. Which one of the following alcoholic drinks is produced without distillation?
(A) Wine
(B) Whisky
(C) Rum
(D) Brandy
Answer: Wine
13. The free living fungus Trichoderma can be used for:
(A) Killing insects
(B) Biological control of plant diseases
(C) Controlling butterfly caterpillars
(D) Producing Antibiotics
Answer: Biological control of plant diseases
14. Which one of the following processes CO2 is not released?
(A) Alcoholic fermentation
(B) Lactate fermentation
(C) Aerobic respiration in plants
(D) Aerobic respiration in animals
Answer: Lactate fermentation
15. High value of B O D (Biochemical Oxygen Demand) shows
(A) water is normal
(B) water is highly polluted
(C) water is less polluted
(D) none of these
Answer: water is highly polluted
16. Which of the following is fermentation process?
(A) batch process
(B) continuous process
(C) both a and b
(D) none of these
Answer: both a and b
17. Who showed that Sacchaaromyces cerevisiae causes fermentation forming products such as beer and buttermilk?
(A) Louis Pasteur
(B) Alexander Fleming
(C) Selman Waksman
(D) Schatz
Answer: Louis Pasteur
18. Rennet is used in
(A) bread making
(B) fermentation
(C) cheese making
(D) antibiotics synthesis
Answer: cheese making
19. Tissue plasminogen activator is
(A) a vitamin
(B) an Enzyme
(C) a chemical that stimulates tissue differentiation
(D) amino acid
Answer: an Enzyme
20. A bioreactor is
(A) hybridoma
(B) Culture containing radioactive isotopes
(C) Culture for synthesis of new chemicals
(D) Fermentation tank
Answer: Fermentation tank
21. Group of bacteria used in biogas production is
(A) Methane
(B) Methanol
(C) Oxygen
(D) NO2
Answer: NO2
22. In 1928, a scientist discovered the first effective antibiotic. Scientist and antibiotic are:
(A) Fleming – Streptomycin
(B) Fleming – Penicillin
(C) Waksman – Penicillin
(D) Waksman – Streptomycin
Answer: Fleming – Penicillin
23. Azolla has a symbiotic association with :
(A) Rhizobium
(B) Anabaena
(C) Nostoc
(D) Azospirillium
Answer: Anabaena
24. Devine and collego are:
(A) Bioinsecticides
(B) Biofungicide
(C) Bioherbicides
(D) Rodenticides
Answer: Bioherbicides
25. My chorrhiza means
(A) Symbiosis between fungus and plants
(B) Symbiosis between plant and bacteria
(C) Symbiosis between algae and fungus
(D) Symbiosis between michorrrhiza of fungus of water and bacteria
Answer: Symbiosis between algae and fungus
26. Azospirillium and Azotobector for example of…..
(A) Decomposers
(B) Free living N2 fixative
(C) Symbiotic N2 fixative
(D) Pathogenes
Answer: Free living N2 fixative
27. Which pair is odd ?
(A) Yeast – Ethanol
(B) Penicillium – Penicillin
(C) Methenogens – Biogas
(D) Streptococus – Statins
Answer: Streptococus – Statins
28. Which living organism works as bio-fertiliser ?
(A) Azolla
(B) Clostridium
(C) Azetobactor
(D) Rhizobium
Answer: Azolla
29. Which micro organism is useful in production of citric acid ?
(A) Azetobactor
(B) Penicillium
(C) Aspergilus niger
(D) Clostridium
Answer: Aspergilus niger
30. By which process cheese and toddy is obtained ?
(A) Fermentation
(B) Distillation
(C) Pasteurisation
(D) Hydrolysis
Answer: Fermentation
31. Humulin is
(A) carbohydrate
(B) protein
(C) fat
(D) antibiotics
Answer: protein
32. Which of the following can be application of fermentation?
(A) tanning of leather
(B) curing of tea
(C) production of vine
(D) all of these
Answer: all of these
33. Enzyme immobilisation is
(A) conversion of an active enzyme into inactive form
(B) providing enzyme with protective covering
(C) changing a soluble enzyme into insoluble state
(D) changing pH so that enzyme is not able to carry out its function
Answer: providing enzyme with protective covering
34. Biogas is produced by
(A) aeobic breakdown of biomass
(B) anaerobic break down of biomass
(C) with the help of methanogenic bacteria
(D) both b and c
Answer: both b and c
35. Name the first organic acid produced by microbial fermentation
(A) citric acid
(B) lactic acid
(C) acetic acid
(D) none of the above
Answer: lactic acid
36. The residue left after methane production from cattle dung is:
(A) Burnt
(B) Burried in landfills
(C) Used as manure
(D) Used in civil construction
Answer: Used in civil construction
37. Pencillin inhibits bacterial mulitiplication because it
(A) Checks RNA synthesis
(B) Checks DNA synthesis
(C) Destroys chromatin
(D) Inhibits cell wall formation
Answer: Inhibits cell wall formation
38. Biogas production from waste biomass with the help of methanogenic bacteria is:
(A) Onestep process
(B) Twostep process
(C) Threestep process
(D) Multistep process
Answer: Threestep process
39. Aquatic fern which is excellent biofertiliser:
(A) Azolla
(B) Salvinia
(C) Marsilea
(D) Pteridium
Answer: Azolla
40. Most famous bacterial fertilizer is:
(A) Nitrosomonas
(B) Nitrobacter
(C) Nitrosococcus
(D) Rhizobium
Answer: Rhizobium
41. What does a high value of BOD(Biochemical Oxygen Demand) indicate?
(A) That water is pure
(B) that water is less polluted
(C) that water is highly polluted
(D) that consumption of organic matter by microbes is higher in the water
Answer: that water is highly polluted
42. This is a good producer of citric acid
(A) Aspergillus
(B) Clostridium
(C) Saccharomyces
(D) Pseudomonas
Answer: Aspergillus
43. This is not an example of performing biological control of diseases/pests using microbes
(A) Trichoderma sp. against some plant pathogens
(B) Nucleopolyhedrovirus against insects and other arthropods
(C) Ladybird beetle against aphids
(D) Bt-cotton to increase yield
Answer: Bt-cotton to increase yield
44. This is chiefly produced by the activity of an anaerobic bacteria on sewage
(A) Laughing gas
(B) Propane
(C) Mustard gas
(D) Marsh gas
Answer: Marsh gas
45. For the production of ethanol, the most common substrate used in distilleries is
(A) Soya meal
(B) Molasses
(C) Ground gram
(D) cornmeal
Answer: Molasses
46. This is not a biofertilizer
(A) Agrobacterium
(B) Nostoc
(C) Rhizobium
(D) Mycorrhiza
Answer: Agrobacterium
47. Carbon dioxide is not released in which of the following processes?
(A) Lactate fermentation
(B) Alcoholic fermentation
(C) Aerobic respiration in animals
(D) Aerobic respiration in plants
Answer: Lactate fermentation
48. Which one is biofertilizer?
(A) Mycorrhiza
(B) N2 Fixing bacteria
(C) N2 Fixing cyanobacteria
(D) All the above
Answer: All the above
49. Which one is wrongly matched?
(A) Streptomyces- Antibiotics
(B) Coliform- Vinegar
(C) Methanogens- Gobar gas
(D) Yeast- Ethanol
Answer: Coliform- Vinegar
50. Highest number of antibiotics are produced by:
(A) Streptomyces
(B) Bacillus
(C) Penicillium
(D) Cephalosporium
Answer: Cephalosporium
51. Which one is useful as a immunosuppresive agent in organ transplant ?
(A) All the given
(B) Cyclosporin-A
(C) Cyclosporin-L
(D) Cyclosprin-C
Answer: Cyclosporin-A
52. IARI means
(A) Indian Agriculture Research Institute
(B) International Agrochemical Research Institute
(C) Indian Agrochemical Research Institute
(D) Indian Agriculture Resource Institute
Answer: Indian Agriculture Research Institute
53. Which group is true for the Enzymes of micro organism ?
(A) Amylase, Protease, Lipase, Protease
(B) Glycin, Renin, Lipase, Melic Acid
(C) Lipase, Protease, Lipase, Amylase
(D) Glyconic acid, protease, Lipase, Amylose
Answer: Lipase, Protease, Lipase, Amylase
54. Which of these processes does not give off CO2?
(A) Lactate fermentation
(B) Aerobic respiration
(C) Alcoholic fermentation
(D) None of the above
Answer: Lactate fermentation
55. High biological oxygen demand in a water body means ________
(A) Water is not polluted
(B) Water is polluted
(C) Waterbody contains lots of lifeforms
(D) None of the above
Answer: Water is polluted
56. The guts of various ruminants contain _________
(A) Acidophiles
(B) Halophiles
(C) Mental retardation
(D) All of the above
Answer: Methanogens
57. Which of the following microbes are used for the commercial production of citric acid?
(A) Xanthomonas citri
(B) Asparagine
(C) Asparagus
(D) Aspergillus
Answer: Aspergillus
58. Saccharomyces cerevisiae is used primarily for
(A) Baking
(B) Bleaching
(C) Biofuel
(D) None of the above
Answer: Baking
59. Acinetobacter baumannii is a _________
(A) Decomposing bacteria
(B) Pathogenic bacteria
(C) Nitrogen-fixing bacteria
(D) None of the above
Answer: Pathogenic bacteria
60. Ethanol can be produced using __________
(A) Saccharomyces cerevisiae
(B) Escherichia coli
(C) Pseudomonas syringae
(D) None of the above
Answer: Saccharomyces cerevisiae
61. Bacillus thuringiensis is used for
(A) Fermentation of beer
(B) Biopesticide
(C) Antibiotic
(D) None of the above
Answer: Biopesticide
62. Before antibiotics, the first commercial antibacterial available was _____
(A) Penicillin
(B) Prontosil
(C) Azithromycin
(D) None of the above
Answer: Prontosil
63. Example of a natural insect repellant
(A) Citronella oil
(B) Coconut oil
(C) Linseed oil
(D) None of the above
Answer: Citronella oil
64. Why is wine distilled?
(A) To reduce toxicity
(B) To enable fermentation
(C) To prevent spoilage
(D) To increase the alcohol percentage
Answer: To prevent spoilage
65. Which of the following is used as a substrate for alcohol fermentation?
(A) Maize
(B) Barley
(C) Sucrose
(D) None of the above
Answer: Sucrose
66. Antibiotics are the most effective on:
(A) Bacteria
(B) Virus
(C) Fungi
(D) None of the above
Answer: Bacteria
67. ____________ is a pigment that gives a pinkish hue to rhizobium induced root nodules.
(A) Leghaemoglobin
(B) Carotenoid
(C) Mauveine
(D) None of the above
Answer: Leghaemoglobin
68. Bacillus thuringiensis is widely used as:
(A) Insecticide
(B) Weedicides
(C) Rodenticide
(D) None of the above
Answer: Insecticide
69. In Swiss cheese, big holes are made by a
(A) bacterium producing methane gas
(B) machine
(C) fungus releasing a lot of gases while its metabolic activities
(D) bacterium producing large quantities of carbon dioxide
Answer: bacterium producing large quantities of carbon dioxide
70. During which stage of the purification of the sewage water are microbes used?
(A) Primary treatment
(B) Secondary treatment
(C) Tertiary treatment
(D) Both (1) and (2)
Answer: Secondary treatment