Download SGBAU BSc 2019 Summer 5th Sem Microbiology Environmental Microbiology n Bioinstrumentation Question Paper

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B.Sc. (Part—IIT) Semester—V Examination

MICROBIOLOGY

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(Environmental Microbiology and Bioinstrumentation)

Time : Three Hours] [Maximum Marks : 80

Note :- (1) All questions are compulsory.

(2) Draw diagrams wherever necessary.

1. (A) Fill in the blanks :
   1. Phytoplankton living in river are known as __________.

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   2. The __________ bacteria are present in root nodules of leguminous plants.
   3. Formation of schmutzdeck layer occurs in __________ filter.
   4. __________ is the coldest layer of atmosphere.
2. (B) Choose correct alternative :
   1. A horizon is related to __________;
      1. Soil profile

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      2. Water profile
      3. Air
      4. None
   2. Coagulation is addition of __________
      1. Sulfur

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      2. Magnesium
      3. Potassium
      4. Alum
   3. Ultra-violet radiations kill microorganisms by causing damage to __________
      1. Protein

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      2. Lipid
      3. DNA
      4. RNA
   4. Proteolysis is __________
      1. Hydrolysis of lipids

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      2. Hydrolysis of Carbohydrates
      3. Hydrolysis of proteins
      4. Hydolysis of fats

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3. (C) Answer in one sentence :
   1. Define Symbiosis
   2. Define Rhizosphere
   3. Give long form of WHO
   4. Define BOD.

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1. (a) Describe sampling of air by settling plate device. (4)
   (b) Describe etiology and symptoms of any one viral airborne disease. (4)
   (c) Explain control of airborne micro-organisms of UV irradiation. (4)
2. (e) Describe slit type air sampler. (4)
   (f) Describe etiology and symptoms of any one bacterial air-borne disease. (4)

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3. Describe symbiotic nitrogen fixation in detail. (12)
   OR
   Describe in detail sulfur cycle with its significance. (12)
4. (a) Describe in brief eutrophication and its control. (4)
   (b) Discuss “Blackout algae” method for planktons control. (4)
   

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   (c) Discuss any four harmful activities of planktons. (4)
   OR
   (d) Describe any two methods to remove colour and odour produced by planktons. (4)
   (e) Discuss beneficial activities of planktons. (4)
   (f) Explain methods of preventing growth of algae. (4)

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5. (a) Explain MPN method for coliforms. (4)
   (b) Differentiate between faecal and non faecal coliforms. (4)
   (c) Describe confirmed test for coliforms. (4)
   OR
   (d) Discuss the advantages of membrane filter technique. (4)
   

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   (e) Give detailed account on IMViC tests of Coliforms. (4)
   (f) Describe ICMR and WHO bacteriological standards of drinking water in detail. (4)
6. (a) Explain construction of slow sand filter (4)
   (b) Explain coagulation and flocculation. (4)
   (c) Give outline of bio-gas production. (4)
   

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   OR
   (d) Explain break point chlorination. (4)
   (e) Discuss in brief Sewage treatment in oxidation pond. (4)
   (f) What is self purification of water ? (4)
7. Define electrophoresis. Describe in detail principle and application of paper. (12)
   

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   OR
   Define chromatography. Describe in detail principle and applications of thin layer chromatography. (12)

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