LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – PLANT BIOLOGY & PLANT BIO-TECH.

VE 21

SIXTH SEMESTER – April 2009

PB 6605 / 6602 – ENVIRONMENTAL BIOTECHNOLOGY

 

 

 

Date & Time: 21/04/2009 / 9:00 – 12:00    Dept. No.                                                       Max. : 100 Marks

 

 

PART –A                                                    (20 marks)

 

1. Choose the correct answer (5×1=5)

1. The filters used in Laminar Air Flow is

1. Seive filters b. HEPA filters c. Sand filters     d. Filter paper

 

1. Increase in deposit of pollutant in the members of food web is called

1. Biomagnification b. Biosorption c. Biostimulation    d. Biodegradation

 

1. Dinococcus radiodurans is able to use

1. Heavy metal b. Pesticide c. Hydrocarbon    d. Radionuclides

 

1. The substances difficult to degrade are called

1. Reversible b. Remedial c. Removable         d. Recalcitrant

 

1. The organism present in Trickling filter includes

1. Thiobacillus spp b. Mycobacteria spp c. Bordetella spp d. Zooglea spp

 

1. State whether the following statements are True or False (5×1=5)

1. Sulphurdioxide causes chlorosis in plants.

 

1. Chlorine in PCB is harmless to microbes.

 

1. Iron ore leaching is done using Thiobacillus ferroxidans.

 

1. EPA is Environment Protection Act.

 

1. Psuedomonas have the enzyme monoxygenases.

 

III. Complete the following                                                                      (5×1=5)

1. ______________ is an unconventional energy resource.

 

1. Chemical treatment of sewage is done using _________________.

 

1. The best way to remove agricultural waste is _________________.

 

1. Removal of waste using plant roots is called ______________.

 

1. The normal depth of anaerobic pond is _____________.

 

 

IV Answer the following within 50 words                                       (5×1=5)

Write short notes on

1. Biofilm

 

1. Chernobyl disaster

 

1. Pesticide as xenobiotic substance

 

1. Methane

 

1. Mercury pollution

 

PART – B

Answer any FIVE of the following in about 350 words                       (5×8=40)

 

1. Write purification of air
2. Explain metal transformation.
3. Describe the Ex-situ bioremediation.
4. Describe the nonconventional energy resources
5. Explain the concept of Biomineralisation.
6. Elaborate on removal of oil spills using microbes.
7. Describe the Anaerbic digestion of waste.
8. What is phytoremediation?

 

PART-C

Answer the following in about 1500 words                                          (2X20=40)

 

29. a. Write in detail the use of microbes in Bioremediation.

OR

1. Describe i. Trickling filter
2.          Activated Sludge process

 

1. a. Explain the pathway for PCP and PCB degradation.

OR

1. Discuss i. Bioleaching
2. Biocorrosions

 

 

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