M.Sc. (Biotechnology) (Semester (CBCS) Examination, 2017
MICROBIOLOGY
Day Date: Tuesday, 18-04-2017 Max. Marks: 70
Time: 10.30 AM to 01.00 PM
N.B. Section- I compulsory.
Answer any four questions from section-II.
Section I
Q.1 Multiple Choice Questions: 07
Example for DNA viruses
Adeno virus Papova virus
Herpes virus and cauliflower moisaic All of the above
On Mac Conkey's medium E. coli forms
Colourless colonies Greenish pigmentation
Pink coloured colonies Medusa head
appearance
AIDS is caused by
Retrovirus Prion Rhabdovirus Parvovirus
Cell-well is
Thick in Gram positive than Gram negative
Thick in Gram negative than Gram positive
Equal in both
Absent in Gram negative cell
Temperature in pasteurization is
62.8 oC 35.7 oC 68.2 oC 60.8 oC
Yeast extract is an excellent source of
Vitamin A Proteins Vitamin B Carbohydrates
The micro-organisms that grow at high salinity are
Osmophiles Halophiles
Both a and b None of these
Define the following terms: 07
Negative staining
Pathogen
Guild
Gram positive bacteria
Autoclave
PHYLIP
TEM
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SLR-RD 106
Section- II
Q.2 What is metagenomics? Explain how it can be applied in microbial
taxonomy.
14
Q.3 Explain in detail the advantage of microbial diversity in biotechnological
applications.
14
Q.4 Give a detailed account of classification of microorganisms based on the
G+C content, DNA, RNA homology and protein profiling.
14
Q.5 Answer any two from the following: 14
With an appropriate example explain the fungal associations with
plants.
Explain with a labeled diagram the lysogenic cycle.
Describe the importance of serial dilution in microbes from a sample.
Q.6 Write short notes on any two of the following 14
Plant viruses
Moist heat sterilization
Photosynthetic microbes