M.Sc. (Semester (CBCS) Examination Oct/Nov-2017
Biotechnology
MICROBIOLOGY
Day Date: Thursday, 16-11-2017 Max. Marks: 70
Time: 10.30 AM to 01.00 PM
Instructions: Section-I compulsory.
Answer any four questions from section-II.
Section I
Q.1 Multiple Choice Questions: 07
Protein particles which can infect are called
Virons Prions
Nucleoids None of these
Peptone water medium is an example for
Synthetic medium Semisynthetic medium
Differential medium None of these
Temperature required for pasteurization is
Above 1500 C Below1000 C
1100 C None of these
Separation of a single bacterial colony is called
Isolation Separation
Pure culturing All of these
Which virus was first observed?
Hepatitis Virus TMV
Herpes Virus None of these
Example of anaerobic medium
Wilson blair medium Mac-conkey medium
Robertson's cooked meat EMB medium
Bacteria which need oxygen for growth are called
Thermophilic bacteria Microaerophilic bacteria
Facultative anaerobic bacteria Mycobacteria
Define the following terms: 07
Xerophiles
Mycotoxins
Lichens
ssRNA
Gram negative bacteria
Pour plate method
Type strain
Section II
Q.2 How are the viruses classified? Add a note on different methods of isolation
and cultivation of viruses.
14
Q.3 What is symbiotic association? What is its influence on the ecosystem? 14
Page 2 of 2
SLR-ME-93
Q.4 Explain the different methods of microbial isolation? How does it help in the
classification of microorganism?
14
Q.5 Answer any two from the following: 14
What is molecular evolution with regards to origin of new genes and
proteins?
What is antagonism? What is influence in discovery of antibiotics?
Explain with suitable example what are fastidious microorganisms?
Q.6 Write short notes on any two of the following 14
Extremophiles
Taxonomic ranks
Culture collection centres