BT503 Midterm and Final Term Current MCQs and Subjective

VU Medical Zone

BT503 Final Term M.C.Q

1. Reintroduction of these “trained” bacteria to the polluted sites should give them an advantage over the indigenous bacteria as they would be better suited to survive and remediate the contamination.
2. The DNA construct contains regions of DNA which are complementary to the plant DNA to enable the inserted piece to recombine into the plant genome.
3. Attack by insects not only causes damage to the plant but also provides a route for bacterial or fungal infection.
4. Bacteria which Thrive at temperatures above 45°C is called as Thermophiles
5. Bacteria which Thrive at temperatures above ~85°C. is called as Hyper thermophiles

Q6. Following factor in linked to toxicity of pollutants…..??????

7. Which attribute of pollutant is not linked to bio magnification

long-lived, • mobile, • soluble in fats, • biologically active other than these option

8. Following substances cannot use to make the vessel of bio filter concrete, metal or durable plastic,( other than these)

Q9. Following cannot be adopted to increase the efficiency of phosphorus removal by activated sludge method?????

10. Following is true about imhoff tank used in anaerobic filter system

(see page no 138 midterm)

11. When facultative ponds receive raw sewage, they are also called primary ponds.
12. In general, enzymatic biosensors are based on the selective inhibition of specific enzymes by different classes of compounds.
13. Which enzyme are used in leather industry

Traditionally, pancreatic enzymes were employed

14. Explosives of characterized by presence of group??????
15. Which statement about chlorinated hydrocarbons is correct fixation of carbon by phytoplankton.
16. Main use of DDT other than fighting crop insects effective in controlling the Anopheles mosquito

malaria

17. The term “endophytes” is usually used to denote non-pathogenic microorganisms.
18. The steps of solid waste management are listed below what is correct

(see the final term ppts page no 396…)

19. Statement about on-sito disposal of waste is incorrect

Advantages: • Bins are potentially a highly hygienic and sanitary management method; and • Final disposal of waste is well away from dwelling areas. Constraints: • Collection, transportation and human resources are required; • System takes time to implement; and • Efficient management is essential. (Other than these)

20. Statement about phytoremediation is false

(see the final term ppts page no 392…)

21. State about sampling for situ monitoring is true (see the final term ppts page no 182…)
22. Following property of hydrocarbon does not contribute poor biodegradation

(see the final term ppts page no 708…)

23. In planning studies for the implementation of the wastewater treatment, the following points must be clearly addressed:

• Environmental impact studies on the receiving body • Treatment objectives

Treatment · level · and removal efficiencies

24. Toxicity represents the potential damage to life and can be both short and long term. It is related to

• Type of the pollutant, • Concentration,• The time of

25. In order for bio magnification to occur, the pollutant must be:• Long-lived,• Mobile,• Soluble in fats,• Biologically active.
26. bio filters can reduce odour release by 95% or more
27. For higher efficiencies of phosphorus removal, effluent polishing methods can adopted: Addition of coagulants
28. In the Inhofe tank, settling occurs in the… .............................upper compartment
29. In the soil, a pollutant has basically four possible destinations:

• Retention in the soil matrix• Retention by the plants• Appearance in the underground water

• Collection by Under drains

30. Facultative ponds which receive raw sewage is also known as ................. primary ponds
31. The bio scrubber is not itself truly a biological treatment system, but rather a highly efficient method of removing odour components by dissolving them.
32. . In the Imhoff tank, settling occurs in the upper compartment (settling compartment).
33. . Biodiesel is derived mostly from ---- vegetable oil
34. . DDT was of great benefit to humans in their fight against ------- malaria
35. . Two characteristics of chlorinated pesticides that led to great harm are

• Their resistance to biodegradation and• their hydrophobicity

36. . A characteristic of explosives is the presence of ----------groups.

Nitro (-NO2)

37. . Endophyte is micro pathogen
38. . up flow anaerobic sludge blanket reactor stand for (UASB)
39. Water treatment accounts for 25% of the total global environmental market.
40. Basic equipment required in Preliminary treatment involves screen, grit chamber and flow meter
41. UASB stands for----------- up flow anaerobic sludge blanket reactor

Q42. Important factors to be considered when evaluating and selecting unit operations and processes except:

1. Process applicability,
2. Applicable flow,
3. Influent characteristics,
4. Sterilization of vessels

Correct answer: Sterilization of vessels

Q43. What is false about final disposal of sludge in ocean?

1. After pre-conditioning, the sewage is disposed in the sea
2. It has beneficial uses.
3. It gives pollution to oceans

Correct answer: It has beneficial uses.

Q44. Which statement is true about Site monitoring analysis sampling?

1. Sampling involves two distinct activities
2. Does not define the objectives of the program
3. Characterize the samples in terms of description, location, batch number, size,

Correct answer: Characterize the samples in terms of description, location, batch number, size,

45. Rhizodegradation refers to the biodegradation of contaminants in the soil by edaphic microbes enhanced by the inherent character of the rhizosphere itself.
46. The correct sequence of Initial Steps in Solid Waste Management:
47. Identify the types of waste. 2. Identify the sources of waste. 3. Determine the potential health hazards from waste. 4. Determine the volume of waste generated 5. Identify safe collection method/s. 6. Identify safe transportation method/s. 7. Identify safe disposal method/s. All of these.

Q47. What is false about Collection stage?

1. Simply refers to how waste is collected for transportation to the final disposal site.
2. Should be carefully planned to ensure that storage facilities do not become overloaded.
3. Collection intervals and volumes of collected waste must be estimated
4. This is the stage when solid waste is transported to the final disposal site

Correct answer: This is the stage when solid waste is transported to the final disposal site

Q48. False about On-site disposal?

1. waste volumes are small,
2. plenty of space is available, and
3. waste is largely organic or recyclable.(biodegradable)
4. waste volumes are large

Correct answer: waste volumes are large

Q49. What is true about Biodiesel?

It is derived mostly from vegetable oils

50. The term “endophytes” is usually used to denote non-pathogenic microorganisms.
51. A tumor-like growth, seen as a crown gall in plants.

Agrobacterium tumefaciens

Q52. What is false about dioxins?

53. a) Dioxins released as by-products in a number of chemical processes

Q54. b) The manufacture of PVC plastics

1. carcinogenic
2. Do not pose threats to environment

Correct answer: Do not pose threats to environment

55. Explosives use nitro functional group
56. Aerobic Co-metabolism of CAHs-II requires NADH to provide the 2H

Q57. What is false about poor biodegradation of hydrocarbons?

1. Complexity of the molecule
2. Branched or aromatic rings are difficult to degrade
3. Low water solubility.
4. Easily degraded by enzymatic attack

Correct answer: Easily degraded by enzymatic attack

58. Nonspecific enzymes are oxygenases that initiate the oxidation of hydrocarbons such as methane or toluene.
59. Western blotting is used to detect proteins

Q60. Due to continuous arrival of food in the form of BOD to the aeration tank, bacteria grow and reproduce continuously. If an indefinite population growth were allowed… ------- following problems arised except

1. The secondary sedimentation tank would become overloaded,
2. The solids would not settle well
3. They would start to leave with the final effluent…
4. option d will be correct option

Correct answer: option d will be correct option

Q61. Wastewater is applied to the soil, supplying water and nutrients necessary for plant growth. Which is not true?

1. Some liquid evaporates,
2. Percolates into the soil,
3. Absorbed by the plants…
4. Generation of aerosols

Correct answer: Generation of aerosols

Q62. Which statement is not true regarding desulphurization of oil and coal?

1. washing pulverized coal and the use of fluidized bed technology
2. Both organic and inorganic sulphur is present in coal
3. Aerobic, acidophilic chemolithotrophs like Thiobacillus species, for desulphurization of the inorganic sulphur in

coal. d) Option d will be correct

Q63. The metals release in air by all following process except

1. Processes of weathering,
2. Erosion
3. Volcanic activity
4. Earthquake

Correct answer: Earthquake

64. mer A gene codes for the enzyme, mercuric ion reductase

Q65. What is true regarding zooplankton?

Rely on tides and currents as a transport

66. Facultative ponds which receive raw sewage is also known as primary ponds

Q67. In the soil, a pollutant has all the possible destinations except?

1. Retention in the soil matrix
2. retention by the plants
3. appearance in the underground water
4. Option d will be correct

Correct answer: Option d will be correct

Q68. What is not true about bio scrubbers?

1. Removing odour components by dissolving them.
2. Most appropriate for hydrophilic compounds
3. Remove toxic metals

Correct answer: Remove toxic metals

69. One such recombinant is a plant where the fatty acid composition in the seed has been modified to produce triacylglycerol’s containing elevated levels of trierucinic acid suitable for use in the polymer industry. Arabidopsis thaliana
70. Unlike other marines species, sharks are characteristically untroubled by bio fouling and studies of their skin have established that its unique texture coupled with its inherent antimicrobial properties help keep them clean of fouling organisms.

Q71. ) Factors related to bio magnifications except

1. Mobile/transfer
2. solubility in fats,
3. biologically active
4. source

Correct answer: source