Prokaryotic Cells

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  • Created by: Katy **
  • Created on: 27-09-14 15:01
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  • Prokaryotic Cells
    • before the nucleus
    • bacteria
    • Cytoplasm
      • contains enzymes for all metabolic reactions
    • Ribosomes
      • free in cytoplasm
      • protein synthesis
    • Nucleoid
      • region in cytoplasm that contain DNA
      • no nuclear membrane
    • DNA
      • circular
      • no proteins to form chromatin
    • Plasmid
      • small circles of DNA
        • separate from main DNA loop
      • used to exchange DNA between bacterial cells
      • useful for genetic engineering
    • Plasma Membrane
      • made of phospholipids & proteins
    • Cell Wall
      • made of murein
        • gylcoprotein
    • Capsule
      • thick polysaccharide layer outside of wall
      • protection against
        • desiccation
        • chemicals
        • phagocytosis
      • fuse together
        • biofilm
          • sticky
          • e.g. Dental plaque
    • Flagellum
      • rigid rotating tail
        • propulsion
      • embedded into cell membrane
      • driven by a H+ gradient across the membrane

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