M.Sc. (Semester II) (CBCS) Examination Mar/Apr-2018
Microbiology
MICROBIAL ECOLOGY AND DIVERSITY
Time: 2½ Hours
Max. Marks: 70
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
Rewrite the sentence by choosing correct alternatives from the following:-
14
The most dominant group of microorganisms in acidic soil is
Algae
Viruses
Fungi
Protozoa
The term ecosystem was first introduced by
Auther Stanely
Alexander
Aurther Tansley
Robert Koch
Thiobacillus species grows at extreme
Alkaline pH
Neutral pH
Acidic pH
High pressure
is the association between luminescent bacteria and marine animals.
Parasitism
Bioluminescence
Predation
v symbiosis
Peptidoglycan is absent in the cell wall of
Psychrophiles
Halophiles
Thermophiles
Barophiles
VAM fungi is an example of
N2 fixer
Phosphate solubilizer
Phosphate absorber
Sulfur supplier
is an association between photosynthetic algae and heterotrophic fungi.
VAM
Lichen
Azolla
Actinorhiza
The entities which do not contain genetic material of their own are
Viroids
Prions
Viruses
Protozoa
Rhodomicrobium is an example of
Green sulphur bacteria
Purple non sulphur bacteria
Cyanobacteria
Green non sulphur bacteria
Page 2 of 2
SLR-UQ-536
10) electrons are required to reduce one mole of nitrogen to two moles of ammonia in N2 fixation.
6
8
2
4
11) is the free living nonsymbiotic photosynthetic N2- fixer
Rhizobium
Azotobacter
Cyanobacteria
Frankia
12) association helps to improve phosphorus nutrition of plants.
Rhizosphere
Mycorrhizae
Root nodulation
Bioluminescence
13) Sulfolobus acidocaldarius is an example of
alkliphile
halophile
acidophile
barophile
14) The bacterial population in soil is controlled by
Bacteria
Protozoa
Actinomycetes
Fungi
PART II
Q.2
Answer any four questions from the following:- Define Microbial interaction. Discuss in detail microbe-microbe, microbe-plant and microbe-animal interactions.
14
Q.3
Explain in detail Anoxygenic photosynthetic microorganism.
14
Q.4
Write an essay on classification of Bacteria.
14
Q.5
Write in short on any Two of the following:
14
Describe in detail General characters of Methanogenic bacteria.
Briefly Explain role of Microbes in Acid mine drainage.
Explain how Microorganisms are playing role in prospecting of oils?
Q.6
Write short notes on any Two of the following:
14
Describe in detail General characters of viruses.
Explain briefly Magneto tactic bacteria.
Briefly describe Oxygenic photosynthetic bacteria.