1 / 18

Bacteria

Bacteria. Size of Bacteria. Average bacteria 0.5 - 2.0 um in diam. RBC is 7.5 um in diam. Surface Area to Volume is 3:1 Typical Eukaryote Cell SA/Vol is 0.3:1 Food enters through SA, quickly reaches all parts of bacteria Eukaroytes need structures & organelles. Shapes of Bacteria. Coccus

mizell
Download Presentation

Bacteria

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Bacteria

  2. Size of Bacteria • Average bacteria 0.5 - 2.0 um in diam. • RBC is 7.5 um in diam. • Surface Area to Volume is 3:1 • Typical Eukaryote Cell SA/Vol is 0.3:1 • Food enters through SA, quickly reaches all parts of bacteria • Eukaroytes need structures & organelles Chapter 5 - The Microbial World

  3. Shapes of Bacteria • Coccus • Chain = Streptoccus • Cluster = Staphylococcus • Bacillus • Chain = Streptobacillus • Coccobacillus • Vibrio = curved • Spirillum • Spirochete 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 • Flagella • Pili • Capsule • Plasma Membrane • Cytoplasm • Cell Wall • Spores Chapter 5 - The Microbial World

  8. Eukaryote Cell Structure Chapter 5 - The Microbial World

  9. Flagella • Motility - movement • Swarming occurs with some bacteria Chapter 5 - The Microbial World

  10. Chapter 5 - The Microbial World

  11. Cytoplasm • 80% Water {20% Salts-Proteins) • DNA is circular, Haploid (1N) • Advantages of 1N DNA over 2N DNA • More efficient; grows quicker • Mutations allow adaptation to environment quicker • Plasmids; extra circular DNA • Antibiotic Resistance • No organelles (Mitochondria, Golgi, etc.) Chapter 5 - The Microbial World

  12. Endospores • Resistant structure • Heat, irradiation, cold • Boiling >1 hr still viable • Takes time and energy to make spores • Bacillus anthracis - spores • Used in biological warfare Chapter 5 - The Microbial World

  13. Chapter 5 - The Microbial World

  14. Bacteria • “Extreme” Bacteria – Domain of Archae • Live near hydrothermal vents 250F, sulfur springs, saline lakes, acid locations. • Extremophiles = “lover of extremes” • Chemosynthesis not photosynthesis Use Sulfate or Methane as energy source to make “food” for themselves since they are autotrophs (self feeders) 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

More Related