Bacteria
Bacterial History <ul><li>The first cells in existence </li></ul><ul><li>Fossils exist for prokaryotes 3.5 billion years a...
Classification <ul><li>Separated into two kingdoms based on rRNA sequencing </li></ul><ul><ul><li>Archea/Archaebacteria </...
Archeabacteria <ul><li>Cell walls contain no peptidoglycan, do contain special lipids </li></ul><ul><li>First found in Ext...
Archeabacteria <ul><li>Three Major Types </li></ul><ul><ul><li>Methanogens- harvest energy by converting CO2 and H2 into m...
Eubacteria  <ul><li>Have one of three major shapes </li></ul><ul><ul><li>Cocci </li></ul></ul><ul><ul><li>Bacilli </li></u...
Eubacteria- Gram Staining <ul><li>Process designed to differentiate between cell wall types </li></ul><ul><li>Gram  Positi...
 
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Bacteria1

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The CCHS Biology Department presentation over bacteria

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Bacteria1

  1. 1. Bacteria
  2. 2. Bacterial History <ul><li>The first cells in existence </li></ul><ul><li>Fossils exist for prokaryotes 3.5 billion years ago </li></ul><ul><li>Most bacteria autotrophic </li></ul><ul><li>Pathogenic bacteria make up only a small percentage of total bacterial species </li></ul>
  3. 3. Classification <ul><li>Separated into two kingdoms based on rRNA sequencing </li></ul><ul><ul><li>Archea/Archaebacteria </li></ul></ul><ul><ul><li>Bacteria/Eubacteria </li></ul></ul><ul><li>Traditionally grouped by structure and physiology, and reaction to stains </li></ul>
  4. 4. Archeabacteria <ul><li>Cell walls contain no peptidoglycan, do contain special lipids </li></ul><ul><li>First found in Extreme environments, but now found everywhere </li></ul>
  5. 5. Archeabacteria <ul><li>Three Major Types </li></ul><ul><ul><li>Methanogens- harvest energy by converting CO2 and H2 into methane gas </li></ul></ul><ul><ul><li>Extreme Halophiles- Salt loving bacteria, use the difference in concentration to generate ATP </li></ul></ul><ul><ul><li>Thermoacidophiles- Live in very hot very acidic places, like near underwater volcanic vents </li></ul></ul>
  6. 6. Eubacteria <ul><li>Have one of three major shapes </li></ul><ul><ul><li>Cocci </li></ul></ul><ul><ul><li>Bacilli </li></ul></ul><ul><ul><li>Spirilla </li></ul></ul>
  7. 7. Eubacteria- Gram Staining <ul><li>Process designed to differentiate between cell wall types </li></ul><ul><li>Gram Positive </li></ul><ul><ul><li>Purple </li></ul></ul><ul><ul><li>Thick peptidoglycan Layer </li></ul></ul><ul><li>Gram Negative </li></ul><ul><ul><li>Pink </li></ul></ul><ul><ul><li>Thin peptidoglycan layer </li></ul></ul><ul><ul><li>Double lipid membrane </li></ul></ul>

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