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School of Sciences Department of Biology BIO508 Cell Biology: Tutorial 4 (Trimester 3, 2016) 1. What are the various morphologies of prokaryotic cells? 2. Name at least two photosynthetic bacteria. 3. Describe the function of pili, fimbriae and flagella. 4. Discuss the structure of flagella in a prokaryotic cell? 5. Gram-positive bacteria lack pili, then how would G+ bacteria attach on other cells or substances? 6. Differentiate Slime layer and Capsule. 7. Distinguish murein and pseudomurein. 8. How G+ bacterial cell wall differs from G- bacterial cell wall? 9. Why Gram- negative bacteria produce endotoxin if enters in blood stream? 10. Why most of the capsulated bacteria are being pathogens? 11. Differentiate Chromosome, Chromatin, DNA and plasmid DNA. 12. How archaebacteria withstands extreme environments such as high temperature, pH and extreme salt conditions. Briefly explain your answer. 13. What is ‘S’ layer? 14. What are the three phyla in Archaebacteria? 15. Name the cytoplasmic structures of a prokaryotic cell and give the function of each structure.
