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Lecture 4 The Bacterial World
- 1. Online bioscience course for grades 6-12 Fall 2009 bio 1.0
- 3. Lecture 4: The bacterial world bio 1.0
- 5. The basic structure of a bacterium (prokaryote): bio 1.0
- 6. Bacterial surface types: bio 1.0
- 8. Active diffusion: bio 1.0
- 9. Bacterial types: bio 1.0
- 10. Bacterial conjugation: http:// en.wikipedia.org/wiki/Bacterial_conjugation bio 1.0
- 12. The pGLO plasmid: http:// en.wikipedia.org/wiki/PGLO bio 1.0
- 13. Bacteria use their flagella to move: bio 1.0
- 14. The structure, assembly and function of the flagellum: http:// www.youtube.com/watch?v =Ey7Emmddf7Y bio 1.0
- 15. Bacterial genome: bio 1.0
- 16. Bacterial genome-”gene music”: http:// www.youtube.com/watch?v =G8ZAGi4ZlFI bio 1.0
- 17. Take Home I From their cell membranes and flagella down to the organization and replication of their DNA bacteria are highly organized and efficient structurally… Bacteria have highly organized structures bio 1.0
- 18. The flagellum “control circuit”: bio 1.0
- 19. In bacteria, genes that are part of a “circuit” often are grouped together in the genome: bio 1.0
- 20. The trp operon: http:// www.youtube.com/watch?v =8aAYtMa3GFU bio 1.0
- 21. Take Home II The DNA genome of bacteria is very highly organized and efficient… The genome of bacteria bio 1.0
- 22. Bacterial growth: http:// www.youtube.com/watch?v = gEwzDydciWc bio 1.0
- 23. DNA replication: bio 1.0
- 24. Bacterial motility: http:// www.youtube.com/watch?v =zlFRJftA2bU bio 1.0
- 25. Bacterial motion and disease: http:// www.youtube.com/watch?v =YZIg8FL4alA bio 1.0
- 26. Take Home III The mechanisms and controls of movement in bacteria are highly varied and play a role in disease… Bacterial cell movement bio 1.0
- 27. In prokaryotes, chromosomal DNA replication starts from a single point (an ori ) and proceeds bi-directionally… bio 1.0
- 28. Semi-conservative DNA replication: http://www.dnatube.com/video/3028/Semiconservative-Replication bio 1.0
- 29. Glycolysis and fermentation: http:// www.youtube.com/watch?v =UmfYnjHs8nk bio 1.0
- 30. Take Home IV Bacterial growth and metabolic pathways are well defined processes… Bacterial cell growth and metabolism bio 1.0
- 31. Biofilms I: http:// en.wikipedia.org/wiki/Biofilms bio 1.0
- 32. Biofilms II: 5 stages of biofilm development. Stage 1, initial attachment; stage 2, irreversible attachment; stage 3, maturation I; stage 4, maturation II; stage 5, dispersion. Each stage of development in the diagram is paired with a photomicrograph of a developing P. aeruginosa biofilm. All photomicrographs are shown to same scale. bio 1.0
- 33. Biofilms III: Stromatolites, proof of Life's Origin http:// www.youtube.com/watch?v =4opsN_iQdEs bio 1.0
- 34. The human microbiome: http:// www.youtube.com/watch?v = zzxEaGjXFZw bio 1.0
- 35. Take Home V Bacteria can form multicellular structures known as biofilms and also form complex symbiotic relation ships within higher organisms such as humans… Bacterial films and the “microbiome” bio 1.0
- 36. Next Week: Higher cells How higher cells are structured and how they function… bio 1.0
- 37. instructor Mark E Minie PhD [email_address] bio 1.0