Microbiology (Semester II) (CBCS) Examination, 2017
MICROBIAL ECOLOGY AND DIVERSITY wateriI
Day Date: Friday, 21-04-2017 Max. Marks: 70
Time: 10.30 AM to 01.00 PM
N.B. 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.

Q.1 Choose the correct alternative given in the bracket. 14
The bacterial population in soil is controlled by
Bacteria Protozoa
Actinomycetes Fungi
is an example of photoautotroph
Protozoa Algae
Fungi Animals
The importance of ecosystem lies in
CO2 production Bacterial degradation
Flow of energy Oxygen production
In process organic matter is decomposed to release
simpler, inorganic compound.
Ammonification Nitrogen fixation
Mineralization Nitrification
Photobacterium shewanella is an example of
Xerophile Barophile Termophile Haophile
is association between two different species that are
beneficial o both population.
Parasitic Predatory Competition Mutualistic
The organisms degrading pesticides are called ____bacteria
Acidophilic Xerophilic Xenobiotic endolithic
In N2 fixation electrons are required for reduction of one
mole of nitrogen to two moles of ammonia.
6 8 2 4
Microorganisms that are found growing in jellies, syrups and brines
are known as what
Acidophiles Halophiles Osmophiles barophiles
Page 1 of 2
10) are the free living aerobic non photosynthetic
nitrogen fixing bacteria.
a)Rhizobium Azotobacter
Anaebena Frankia
11) Pseudomonas pulida is used for
Methanogenesis Biomagnifications
Bioremediation d)N2 fixation
12) Sulphur is oxidized to sulphate or H2SO4 by
Bacillus Thiobacillus thioxidans
Nitrobacter Staphylococcus
13) Nitrogen is required for the production of molecules.
a)Fatty acids b)Phospholipids
Nucleotides Cellulose
1C4) phodomicrobium is an example of
Green sulphur bacteria Purple non sulphur bacteria
Cyanobacteria Green non sulphur bacteria
(PART-II)
Answer any four question from the following:
Q.2 What is biodeterioration? Discuss in detail biodeterioration of wood,
pharmaceutical products, and rubber.
14
Q.3 Explain in detail microorganisms in toxic environments and add a note
on mine drainage.
14
Q.4 Describe in detail general characteristics and outline classification of
Bacteria and Molds.
14
Q.5 Write in short on any Two of the following: 14
Describe in detail general characteristic of purple and green
sulphur bacteria
What are basic ecological principles? Explain briefly ecological
niches
Describe briefly general characteristics of cyanobacteria.
Q.6 Write short notes on any Two of the following: 14
Wshat is Bioluminescence? Explain with example.
Define ecosystem with examples.
Describe in detail role of microorganisms in prospecting of oils.