Total No. of Questions 12] [Total No. of Pages 02
M.Sc. Previous DEGREE EXAMINATION, MAY 2017
First Year
MICROBIOLOGY
Environmental and Agricultural Microbiology
Time 3 Hours Maximum Marks: 70
SECTION A
Answer any FIVE questions from the following × 6 30)
Q1) Aeroallergens.
Q2) Microbial propagules in air.
Q3) Transformation of carbon in soil.
Q4) Components of soil.
Q5) Rhizobia complex.
Q6) Azospirillum.
Q7) Symptoms caused by plant pathogenic bacteria.
Q8) Blast of Rice.
SECTION B
× 10 40)
Q9) Describe the techniques of air sampling.
OR
Describe the methods of sewage treatment.
Q10) Write an account on methods of isolation of soil microflora.
OR
Describe the diversity and abundance of dominant soil microorganisms.
Q11) Describe the structure and functions of legume root nodules.
OR
Describe the types of mycorrizae and the importance of VAM..
Q12) Write an account on biological control of plant diseases.
OR
Describe the symptomatology, etiology, epidemiology and control of Late
blight of Potato.