b112_Lecture_27

b112_Lecture_27 - 2/5/2008 BIOL112 Chapter27 TheProkaryotes

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2/5/2008 1 BIOL 112–Chapter 27 The Prokaryotes Structure, Function & Reproduction Most have cell walls Most are motile Cell structure simpler than in eukaryotes Reproduction rapid & non sexual Greatest metabolic diversity of all groups of organisms The Shapes of Cells Basic Bacterial Structure The Cell Wall
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2/5/2008 2 Structure of Peptidoglycan NAG = N-acetyl glucosamine NAM = N-acetyl muramic acid Crosslinking in Peptidoglycan Gram+ Cell Wall Gram— Cell Wall Capsules Pili & Flagella
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2/5/2008 3 Movement in Prokaryotes Flagella Helical filaments (spirochetes) Gliding – Production of slime and use of flagellar motors to glide Flagellar Structure Internal Cell Structure No Organelles Nucleoid region–DNA concentrated here Internal membranes Respiration Photosynethesis Prokaryotic Reproduction & Growth Binary fission–Very rapid! Genetic recombination Transformation Conjugation Transduction Endospores – Clostridium tetani Endospores Core - dehydrated cytoplasm containing DNA, ribosomes, enzymes etc.
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b112_Lecture_27 - 2/5/2008 BIOL112 Chapter27 TheProkaryotes

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