Technology

Bacteria

Description
1. Bacteria Click here for Bacteria music video Click here for info on cell phone bacteria 2. Size of Bacteria <ul><li>Average bacteria 0.5 - 2.0 um in diam.…
Categories
Published
of 19
All materials on our website are shared by users. If you have any questions about copyright issues, please report us to resolve them. We are always happy to assist you.
Related Documents
Share
Transcript
  • 1. Bacteria Click here for Bacteria music video Click here for info on cell phone bacteria
  • 2. Size of Bacteria <ul><li>Average bacteria 0.5 - 2.0 um in diam. </li></ul><ul><ul><li>RBC is 7.5 um in diam. </li></ul></ul><ul><li>Surface Area to Volume is 3:1 </li></ul><ul><li>Typical Eukaryote Cell SA/Vol is 0.3:1 </li></ul><ul><li>Food enters through SA, quickly reaches all parts of bacteria </li></ul><ul><li>Eukaroytes need structures & organelles </li></ul>Chapter 5 - The Microbial World
  • 3. Shapes of Bacteria <ul><li>Coccus </li></ul><ul><ul><li>Chain = Streptoccus </li></ul></ul><ul><ul><li>Cluster = Staphylococcus </li></ul></ul><ul><li>Bacillus </li></ul><ul><ul><li>Chain = Streptobacillus </li></ul></ul><ul><li>Coccobacillus </li></ul><ul><li>Vibrio = curved </li></ul><ul><li>Spirillum </li></ul><ul><li>Spirochete </li></ul>Chapter 5 - The Microbial World
  • 4. Chapter 5 - The Microbial World
  • 5. Chapter 5 - The Microbial World
  • 6. Chapter 5 - The Microbial World
  • 7. Bacterial Structures <ul><li>Flagella </li></ul><ul><li>Pili </li></ul><ul><li>Capsule </li></ul><ul><li>Plasma Membrane </li></ul><ul><li>Cytoplasm </li></ul><ul><li>Cell Wall </li></ul><ul><li>Spores </li></ul>Chapter 5 - The Microbial World
  • 8. Chapter 5 - The Microbial World Eukaryote Cell Structure
  • 9. Flagella <ul><li>Motility - movement </li></ul><ul><li>Swarming occurs with some bacteria </li></ul>Chapter 5 - The Microbial World
  • 10. Chapter 5 - The Microbial World
  • 11. Bacteria <ul><li>Their cytoplasm is 80% Water </li></ul><ul><li>DNA is circular, Haploid (1N) </li></ul><ul><ul><li>Advantages of 1N DNA over 2N DNA </li></ul></ul><ul><ul><ul><li>More efficient; grows quicker </li></ul></ul></ul><ul><ul><ul><li>Mutations allow adaptation to environment quicker </li></ul></ul></ul><ul><li>Plasmids; extra circular DNA </li></ul><ul><ul><li>Antibiotic Resistance </li></ul></ul><ul><li>No organelles (Mitochondria, Golgi, etc.) </li></ul>Chapter 5 - The Microbial World
  • 12. Endospores <ul><li>Resistant structure </li></ul><ul><ul><li>Heat, irradiation, cold </li></ul></ul><ul><ul><li>Boiling >1 hr still viable </li></ul></ul><ul><li>Takes time and energy to make spores </li></ul><ul><li>Bacillus anthracis - spores </li></ul><ul><ul><li>Used in biological warfare </li></ul></ul>Chapter 5 - The Microbial World
  • 13. Chapter 5 - The Microbial World
  • 14. Bacteria <ul><li>“ Extreme” Bacteria – Domain of Archae </li></ul><ul><ul><li>Live near hydrothermal vents 250F, sulfur springs, saline lakes, acid locations. </li></ul></ul><ul><ul><li>Extremophiles = “lover of extremes” </li></ul></ul><ul><ul><li>Chemosynthesis not photosynthesis </li></ul></ul><ul><ul><li>Use Sulfate or Methane as energy source to make “food” for themselves since they are autotrophs (self feeders) </li></ul></ul>Chapter 5 - The Microbial World
  • 15. Chapter 5 - The Microbial World
  • 16. Chapter 5 - The Microbial World
  • 17. Chapter 5 - The Microbial World
  • 18. Chapter 5 - The Microbial World
  • 19. Binomial nomenclature: Genus & Species
  • Lecture 22

    Jul 23, 2017
    Search
    Related Search
    We Need Your Support
    Thank you for visiting our website and your interest in our free products and services. We are nonprofit website to share and download documents. To the running of this website, we need your help to support us.

    Thanks to everyone for your continued support.

    No, Thanks