M.Sc. (Semester II) (CBCS) Examination Oct/Nov-2017
Microbiology
MICROBIAL ECOLOGY AND DIVERSITY
Day Date: Monday, 20-11-2017 Max. Marks: 70
Time: 10.30 AM to 01.00 PM
Instructions: Part- Questions No.1 Compulsory.
Attempt any 4 questions from Part II.
Figures to the right indicate full marks.
Answer to the Part I and Part II are to be written in same answer booklet
only.
PART I
Q.1 Choose the correct alternative given in the bracket. 14
The importance of ecosystem lies
CO2 production Flow of energy
Bacterial degradation Oxygen production
The denitrifying bacteria convert nitrate to nitrite and nitrous
oxide
NO3 N2O
N2 NH3
phylogenic domain of prokaryotes consists of halophiles and
extreme thermopiles.
Archaebacteria Protozoa
Actinomycetes Actinorhiza
Fe3O4 particles are present in
Acidophilic Magnetotactic
Alkaliphilic Xerophiles
Pseudomonas putida is used for
Methanogenesis Biomagnifications
Bioremediation N2fixation
LUX gene is responsible for
N2fixation Biolumiscence
Methanogenesis Nitrification
The organisms degrading pesticides are called
Acidophilic Xerophilic
Xenobiotic Endolithic
Bioluminescence is the result of mutualistic association
Bacteria and fungi
Luminescent bacteria and marine invertebrates
Animal and viruses
Algae and fungi
Page 2 of 2
SLR-MQ-585
Taq polymerase enzyme used in PCR is produced by
Bacillus thermophilus Thermos aquaticus
Bacillus subtilis Thermoplasma
10) the free living aerobic non photosynthetic nitrogen fixing bacteria.
Rhizobium Azotobacter
Anaebena Frankia
11) Methanopyrus kandleri is an example of
Halophile Hyperthermophile
Psychrophile Barophile
12) Sulphur is oxidized to sulphate or H2SO4 by
Bacillus Thiobacillus thioxidans
Nitrobacter Staphylococcus
13) an example of lichens.
Permelia Trichospor nigrecans
Hyphomonas Pyrolobus fumarii
14) Photo bacterium shewanella is an example of
Xerophile Barophile
Thermophile Halophile
PART II
Q.2 Explain in detail "Role of micro organisms in biological nitrogen fixation." 14
Q.3 Give detail account of Extremophiles and add a note on its role in ecosystem. 14
Q.4 Write an essay on Microbial Ecology and ecosystem management. 14
Q.5 Write in short on any Two of the following: 14
Concept of Autotrophy
Identification of uncultured organisms
Microbial fossils
Q.6 Write short notes on any TWO of the following: 14
General characters of Archaeobacteria.
Describe in detail plant microbe interactions.
Briefly describe population explosion.