M.Sc. (Semester II) (CBCS) Examination Nov/Dec-2018
Microbiology
MICROBIAL ECOLOGY AND DIVERSITY
Time: 2½ Hours Max. Marks: 70
Instructions: Part-I, question 1 is compulsory.
Attempt any four questions from Part II
Figures to the right indicate full marks.
Answers to the Part I and Part II are to be written in same answer
Booklet only.
PART I
Q.1 Rewrite the sentences by choosing correct answer from given alternatives: 14
Lichens represent an example of
Mutualism Commensalism
Parasitism Aggregation
The richest and the most threatened reservoirs of plant and animal life on
earth are
National Park Hot Spots
Green Pots Host Spots
Conservation of biodiversity in their natural habitats is called
conservation.
Ex situ Protected
In Situ Stabilized
The community in equilibrium with environment is called
community.
Co-action Stratification
Ecesis Climax
The better idea of the productivity of an ecosystem can be obtained by

Pyramid of energy Pyramid of biomass
Pyramid of number Inverted pyramid
Association of fungi or fungal hyphae in between and within cortex cell is
called
Ectomycorrhiza Endomycorrhiza
Ectomorphic mycorrhiza Ectoviruses
VAM shows symbiotic relationship with
Algae Grasses
Fungi Viruses
Usnea is a common example of
Algae Fungi
Bacteria Lichens
is a free living heterotrophic nitrogen fixer.
Azotobacter Rhizobium
Streprococcus Clostridium
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SLR-VP-433
10) The effect of pollution is mainly on
Crop rotation Ecological balance
Mutation Cell division
11) An ecosystem refers to
The biotic factors in a habitat
A community of organism interacting with one another
The community of organisms together with the environment in which they
live
The part of earth atmosphere capable of inhibiting the living organisms
12) The term ecosystem was first introduced by
Alexander Rachel Carson
Aurther Stanely Aurther Tansely
13) Marine bacteria grow best at salt concentration of
2.5 to 4 1.5 to 2
0.5 to 1 0.1 to 1
14) Actinomycetes is a link between bacteria and
Rickettsia Viruses
Fungi Protozoa
PART II
Answer any four questions from the following:-
Q.2 Write an essay on "Microbe-plant" interactions and their significance. 14
Q.3 Give an account of acidophilic and Psychrophilic. 14
Q.4 Write an essay on micro-organisms in toxic environment. 14
Q.5 Write short answer on any two of the following:- 14
Write general characteristics of viruses and lichens.
Explain identification of uncultured organism.
Give role of viroids and prions in biosphere.
Q.6 Write short notes on any 14
Magnetotactic bacteria
Characteristics of halophilic microorganisms explain their role in
environment.
Ecosystem.