Q2/9K/04-13 Reg. No

St. Joseph’s College of Arts & Science (Autonomous) St. Joseph’s College Road, Cuddalore – 607001 MB202 – MICROBIAL PHYSIOLOGY

Time : 3 hrs

Max Marks :75 SECTION – A (10X1=10) Answer ALL Questions

1. The carbon source of chemo autotropic bacteria a) Carbon mono-oxide b) Carbon dioxide c) Organic compound d) Cellulose 2. The salt loving organisms are called a) Thermophiles b) Halophiles c) Psychrophiles d) Acidophiles 3. Cells divide exponentially during this growth phase a) Lag b) Log c) Stationary d) Decline 4. Pick out the endospore forming bacteria a) Bacillus b) Clostridium c) Both a and b d) Agrobacterium 5. The transport of nutrients inside the cell against concentration gradient is called a) Simple diffusion b) Facilitated diffusion c) Active transport d) All the above 6. Spirochete bacteria move by a) Flagella b) Axial Flagella

c) Cilia

d) All the above

7. One pair of electrons pass down the respiratory chain produces a) 3 ATP b) 12 ATP c) 24 ATP d) 38 ATP 8. Glycolysis yields two molecules of a) Acetic acid b) Ethanol c) Pyruvate

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d) Carbon dioxide

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9. The production of light is associated with a) Bioremediation b) Biomanification c) Bioluminescence d) Biodeterioration 10. The cyclic photosynthesis takes place in a) Plants b) Cyanobacteria c) Photobacteria

d) Algae

SECTION – B (5X3=15) Answer any FIVE Questions 11. Write a brief account on lyophilization. 12. Explain bacterial reproduction. 13. Comment o synchronous growth. 14. Write a brief account on group translocation. 15. Write short notes on chemotaxis. 16. Write a brief account on electron transport chain in aerobic microbes. 17. Differentiate between cyclic and non-cyclic photosynthesis. SECTION – C (5X10=50) Answer ALL Questions 18. a) Write a detailed account on major nutrients and their role in metabolism. (or) b) Discuss the environmental factors affecting microbial growth. 19. a) Describe the methods of measurement of microbial growth.

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(or) b) Explain different phases of growth curve and physiological state of the cells. 20. a) Discuss the motility of bacteria with illustrations. (or) b) Write a detailed account on facilitated diffusion in bacteria. 21. a) Discuss in detail EMP pathway. (or) b) Compare energy production in respiration and fermentation. 22. a) Explain the significance of glyoxalate cycle. (or) b) Write a detailed account on ATP synthesis in bioluminescence.

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