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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI 600 034 B.Sc.DEGREE EXAMINATION CHEMISTRY ADV. ZOOLOGY THIRDSEMESTER APRIL 2017
PB 3206/PB 3200 GENERAL MICROBIOLOGY
Date: 04-05-2017 Dept. No. Max. 100 Marks
09:00-12:00 Part A Answer the following, each within 50 words. (10 x 2 20 Marks)
1. What are Prokaryotes?
2. Draw and label a Bacteriophage.
3. Mention any two roles of bacterial capsule.
4. What is bacterial growth curve?
5. Define Conjugation.
6. Write notes on bacterial plasmid.
7. Give any two control measures for Tobacco Mosaic disease.
8. What is 'Necrosis'?
9. What are Diazotrophs? Give an example.
10. Comment on Bioflocculation.
Part B Answer the following, each within 500 words. Draw diagrams and flowcharts wherever necessary. x 7 35 Marks)
11. Elucidate the classification of fungi.
Or List out the salient features of viruses with examples.
12. Explain the process of endospore formation.
Or Draw and describe the bacterial cell.
13. Describe the structure and regulation of Lac Operon.
Or Explain the mechanism of transformation in bacteria.
14. Write notes on the host, pathogen, symptoms and control measures for citrus
canker. Or Explain the plant disease caused by Mycoplasma.
15. How Cheese is produced at large scale?
Or Give an account on the positive and negative interactions among soil microbes.
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Part C Answer any three of the following, each within 1200 words. Draw diagrams and flowcharts wherever necessary.(3 x 15 45 Marks)
16. Explain the characteristics and classification of Algae.
17. Describe the structure of cell wall in gram positive and gram negative bacteria.
18. Write detailed notes on generalized and specialized transduction.
19. Illustrate the life cycle of Puccinia. Mention its control measures.
20. Explain the steps involved in waste water treatment.