Chapter 27 - Prokartyoes Notes

Chapter 27 - Prokartyoes Notes - PROKARYOTES Chapter 27...

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PROKARYOTES- Chapter 27 PROKARYOTE MORPHOLOGY    Unicellular  No nuclear membrane;   NO internal organelles made of membranes  DNA = circular  SHAPE: rod (bacillus); spheres (coccus); spiral (spirillus)  Smaller ribosomes than eukaryotes (70S vs 80S)  Infoldings in cell membrane can create places for H +  gradients CELL WALL -   PEPTIDOGLYCAN  = polysaccharide  + amino  acid  chains   LIPOPOLYSACCHARIDES  = lipids  + polysaccharides   GRAM POSITIVE/NEGATIVE bacteria- react  differently  to staining       Gram  negative  pathogenicity  linked  to lipopolysaccharide  layer   MOTLITY FLAGELLA – different from eukaryotic flagella    Single protein filament/ not 9 + 2 pattern   TAXIS- can move toward/away from stimulus REPRODUCTION/GENETIC RECOMBINATION   BINARY FISSION-reproduce asexually   TRANSFORMATION- incorporate extracellular DNA   TRANSDUCTION- viruses transfer DNA
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