Total No. of Questions 12] [Total No. of Pages 2
M.Sc. (Previous) DEGREE EXAMINATION, MAY 2018
MICROBIOLOGY
First Year
Environmental and Agricultural Microbiology
Time 3 Hours Maximum Marks 70
SECTION A × 6 30)
Answer any Five questions from the following
Q1) Aeroallergens
Q2) Sewage treatment
Q3) Components of soil
Q4) Transformation of iron in soil
Q5) Symbiotic nitrogen fixers
Q6) Cyanobacteria as bioinoculants
Q7) Soft rot of vegetables.
Q8) Black stem rust of wheat
SECTION B × 10 40)
Answer all questions
Q9) Describe the seasonal and diurnal periodicities of Air spora.
OR
Describe the methods of treatment of water for drinking purpose.
Q10) Describe the transformation of phosphorous in soil.
OR
Write an account on soil organic matter decomposition.
Q11) Describe the structure and functions of legume root nodules.
OR
Describe the types of Mycorrizae and importance of VAM.
Q12) Describe the symptoms caused by plant pathogenic Bacteria.
OR
Write an account on Biological control of plant diseses.