DEPARTMENT OF MICROBIOLOGY
SOIL, AGRICULTURE MICROBIOLOGY AND BIODEGRADATION
TIME:
2 HOURS MAXIMUM: 50 MARKS
SECTION - A
ANSWER
ALL THE QUESTIONS (5X4=20)
1. a) Give an account
on any three non-symbiotic N₂ fixers. (or)
b) Add a note on nif genes
2. a) Describe the
phosphorus cycle (or)
b) Give an account on sulfur cycle.
3. a) Discuss the Rhizobium. (or)
b) Give a note on root nodulation.
4. a) Write short
notes on cyanobacteria (or)
b) Comment the biopesticides with suitable
example
ANSWER
ALL THE QUESTIONS (10×3=30)
5. a) Explain in the
detail about nitrogen cycle.
(or)
b) Write an essay on VAM
6. a) Give an
detailed account on Biodegradation. (or)
b) Explain about the microbial
transformation of sulfur.
7. a) Describe about
the Nitrogen fixation process. (or)
b) Explain about the Trichoderma viridae.
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