CELS Prokaryotes (bacteria)

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Author:
jordan.smith
ID:
205011
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CELS Prokaryotes (bacteria)
Updated:
2013-03-07 03:39:37
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Description:
Bacteria
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  1. Outline structure of gram-negative bacterial cell wall.
    Lipopolysaccharide layer surrounding THIN peptidoglycan layer.
  2. Outline structure of gram-positive bacterial cell wall.
    Thick peptidoglycan layer surrounding the plasma membrane.
  3. Stain colour of gram-negative bacteria?
    Pink
  4. Stain colour of gram-positive bacteria.
    Purple
  5. Overview structure of bacterial capsule.
    Glycocalyx (carbohydrate). Slippery surface.
  6. Overview function of bacterial capsule.
    Resists dessication (dehydration) and phagocytosis.
  7. Overview structure of bacterial flagella.
    Flagellin protein, alpha-helix
  8. Overview function of bacterial flagella.
    Motility.
  9. Overview structure of bacterial Fimbriae (pili)
    Protein containing hair-like structures surrounding bacteria surface.
  10. Overview function of bacterial fimbriae (pili). (2)
    • Adhesion to surfaces
    • Sex pili - conjugation (transfer of genetic material)
  11. Define nucleoid region of a prokaryotic cell.
    Non-membrane surrounded area of cell where the DNA is concentrated.
  12. Overview structure of bacterial endospores.
    Copy of bacterial chromosome surrounded by tough coat with water removed.
  13. Overview function of bacterial endospores.
    Secures safety of bacteria's DNA when under threat. Extremely resistant to heat and chemicals.
  14. Overview function of bacterial ribosomes.
    50% smaller than eurkarotic ribsomes.
  15. Overview function of bacterial ribosmes.
    Synthesis proteins from DNA instructions.
  16. List constituents of peptidoglycan in bacterial cell wall and overview it's structure.
    • Acetyl glucosamine
    • Acetyl muramic acid
    • Amino acid peptide chains

    Polysaccharide backbone cross-linked with peptide chain

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