DEPARTMENTOFMICROBIOLOGY
SOIL, AGRICULTUREMICROBIOLOGYAND
BIODEGRADATION
TIME: 2 HOURS MAXIMUM:75 MARKS
SECTION–A
ANSWERALLTHEQUESTIONS (5X5=25)
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 an note on root nodulation.
4. a) Write short
notes on cyanobacteria (or)
b) Comment the biopesticides with suitable
example
5. a) Discuss about
difference between symbiotic & non symbiotic microbes.(or)
b) How does the organic matter decomposed?
ANSWERALLTHEQUESTIONS 10×5=50
6. a) Explain in the
detail about nitrogen cycle.(or)
b) Write an essay on VAM
7. a)Give and
detailed account on Biodegradation.(or)
b) Explain about the microbial
transformation of sulfur.
8. a) Describe about
the Nitrogen fixation process.(or)
b) Explain about the Trichoderma viridae.
9. a) Write a note on
cyanobacteria.(or)
b) Explain about the microbial transformation
of sulfur.
10. a) Write a detail
account on the process of leather environments.(or)
b)Explain in detail the phosphorus cycle
with neat sketch.
