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P.T.O.
MAR IVANIOS COLLEGE (AUTONOMOUS)
THIRUVANANTHAPURAM
Reg. No. :.………………… Name :.…………………
Second Semester Career Related Degree Examination, June 2017
First Degree Programme under CBCSS Vocational Course II: (for Botany and Biotechnology)
AUBB251: Microbial Metabolism, Genetics and Diseases
Time: 3 Hours Max. Marks: 80
SECTION A
Answer ALL the following in a word or one or two sentences.
1. Chemotaxis
2. Bacterial spores
3. Heterotrophic organisms
4. Plasmid
5. Spontaneous mutation
6. Transposable genetic elements
7. Transformation
8. Botulism
9. Lag phase
10. Nucleoid
(10 x 1 10 Marks)
SECTION B
Answer any EIGHT questions, not exceeding a paragraph.
11. Write short note on bacterial growth curve.
12. Draw the diagram of a bacterial cell and name its parts.
13. What do you understand by anoxygenic photosynthesis
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14. Differentiate pili and flagella indicating their functions.
15. Name the vaccines used for poliomyelitis.
16. What is rabies Enlist the properties of rabies virus.
17. What is the overall reaction for biological nitrogen fixation
18. What is the evolutionary explanation for the existence of transposable elements in prokaryotes
19. What is the biological significance of overlapping genes
20. What genetic mechanisms lead to the evolution of multiple drug resistance
21. Compare the energy yield of aerobic and anaerobic respiration.
22. Compare and contrast oxidative phosphorylation and photophosphorylation.
x 2 16 Marks)
SECTION C
Short essay type Answer any SIX questions.
23. Describe the methods followed for the determination of bacterial count.
24. Give a brief account of the various nutritional types of prokaryotes.
25. What is influenza Describe the replication of influenza virus.
26. Define methanogenesis. With illustrations explain the process of methane fermentation.
27. Enlist the industrial and agricultural applications of bacterial metabolism.
28. Illustrate the chemical reactions of glycolysis highlighting the ATP generation steps.
29. Discuss the classification of plasmids based on their ability to transfer to other microbes.
30. Discuss the first experiment that provided evidence for DNA as genetic material capable of transferring genetic information.
31. What is transduction Mention the two types of transduction events seen in prokaryotic cells.
x 4 24 Marks)
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SECTION D
Long essay type Answer any TWO questions.
32. What are the factors that influence the growth of the microorganisms in food Differentiate between food intoxication and food infection. Give brief account of a disease due to food intoxication and a disease due to food infection.
33. What are transposons Describe the classes of prokaryotic transposons.
34. Define conjugation. What is the role of F factor in conjugation Define the following bacterial states with respect to F episomes: Hfr, and F-.
35. Discuss in detail the two life cycles of a virus.
x 15 30 Marks)