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BIOch27 - Ch 27 Prokaryotes 1:30 PM Prokaryotes Organisms...

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Ch. 27: Prokaryotes 8/29/06 1:30 PM Prokaryotes: Organisms that do not have a well-formed nucleus · Bacteria and archae · Usually unicellular · At the limit of light microscopes Three types · Spheres (Cocci) · Rod (Baccili) · Spirals Cell wall (peptidoglycan) made of Sugar and polypeptides—long chains of amino acids Gram +/- bacteria · More gram neg bacteria are more resistant to antibiotics · Capsule Fimbrae Pili About half of bacteria move · Flagella Positive/Negative chemotactics Binary Fission Categories of Bacteria
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Ch. 27: Prokaryotes 8/29/06 1:30 PM · Photoautotrophs: undergo photosynthesis o cyanobacteria · Chemoautotrophs: obtain energy from sulfur produced by deep sea vents o Hydrothermal vents –  · Photoheterotrophs: can photosynthesize but still need carbon · Chemoheterotrophs: decomposers—decompose organic material; need organic  material (organic detritus) ·
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