Environmental Biotechnology Mid - I, September - 2014

1.Which of the following bacterium is called as the superbug that could clean up oil spills
  • Bacillus subtilis
  • Pseudomonas putida
  • Pseudomonas denitrificans
  • Bacillus denitrificans
Answer: B
2.What is the role of restriction endonucleases in bacterial cells?
  • To degrade invading phage DNA
  • To produce RNA primers for replication
  • To replicate
  • To degrade the bacterial chromosomes into small pieces.
Answer: A
3.Which one of the following is not a bio indicator of water pollution?
  • blood worms
  • stone flies
  • sludge worms
  • sewage fungus
Answer: B
4.The common methods used for disinfection in waste water treatment plants are
  • chlorination
  • toxins
  • heat
  • Phenolic solvent
Answer: A
5.Sedimentation is a physical process used in wastewater treatment to
  • remove particles that are less dense than water
  • remove particles that are more dense than water
  • remove the pertinacious material from the water
  • it does not remove particles.
Answer: B
6.The term ‘Phytoremediation’ refers to:
  • the Use of plants for removing pollutants from the environment
  • Use of plants as remedies to cure diseases
  • Use of plants for restoration of degraded forests
  • Use of plants in the retention of soil water
Answer: A
7.Which of the following IS NOT a bioremediation process
  • Bioventing
  • Biosparging
  • Biolifting
  • Phytoremediation
Answer: C
8.A sewage treatment system where sewage is sprayed over rocks coated with bacteria is called:
  • sludge digesting
  • activated sludge system
  • drain
  • a trickling filter system.
Answer: D
9.A non directed physic chemical interaction between heavy metal ions and microbial surface is called:
  • Biotransformation
  • bioconversion
  • bio sorption
  • bio mining
Answer: C
10.The process of extracting metals from ore bearing rocks is called
  • bio extraction
  • microbial extraction
  • bio filtration
  • bioleaching
Answer: D
11.A ___________ is an organism or biological response that reveals the presence of the pollutants by the occurrence of typical symptoms or measurable responses.
Answer: Bioindicator
12.Lichens is a biological indicator of __________
Answer: Sulphuroxide
13.The key part of a biosensor is transducer is __________
Answer: A transducer
14.During sewage treatment, the sewage is subjected to __________ treatment in Imhoff tank.
Answer: Digestion and sedimentation
15.Compound totally resistant to biodegradation is called_______________
Answer: Recalcitrant
16. A method which is used to control pollutants of particulate nature is_______________
Answer: Electrostatic precipitators
17.Removal of pollutants and collection at a place to facilitate microbial degradation is called _____________________
Answer: Ex situ bioremediation
18.hyper accumulators are ________________
Answer: Natural plants
19.___________ is a form of bioremediation in which fungi are used .
Answer: Mycoremediation
20.______________ is an example of renewable energy.
Answer: Water, solar energy