BIOL%20438%20Lecture%203_090308

BIOL%20438%20Lecture%203_090308 - Prokaryotic Cell...

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Prokaryotic Cell Structure and Prokaryotic Cell Structure and Function Function Cell Membranes Cell Membranes
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Prokaryotes differ from eukaryotes in many traits including size and ___________________ systems (e.g., chloroplasts, mitochondria). Prokaryotes are divided into Bacteria and Archaea . Bacteria are divided into 2 groups based on their Gram stain reaction. “pro” = earlier than/before (Gk) “kary” = nucleus of a cell (Gk)
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Prokaryotic Cellular Structure: Prokaryotic Cellular Structure: General Concepts General Concepts Bacteria have a relatively simple cell structure. Lack a defined cell nucleus and subcellular organelles such as mitochondria and chloroplasts. Most bacteria are relatively small: generally, 0.5-5.0 μm in their longest dimension. Some exceptions exist (e.g., ‘giant’ bacteria like Thiomargarita sp. may grow past 0.5 mm in size). Possess distinctive cell and colony morphologies (shapes). __cell size = __S/V ratio = __metabolic rate + __growth
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Bacterial Shape: Common Shapes Coccus Round, spherical E.g. Staphylococcus epidermidis Rod (bacillus) E.g. E. coli
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This note was uploaded on 09/01/2008 for the course BIOL 438 taught by Professor Thompson during the Fall '08 term at Purdue University-West Lafayette.

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BIOL%20438%20Lecture%203_090308 - Prokaryotic Cell...

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