AP_Bio_-_ch_27_prokaryotes

AP_Bio_-_ch_27_prokaryotes - Prokaryotes & The Origin of...

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Prokaryotes & The Origin of Metabolic Diversity It has been said that prokaryotes are much better evolved than vertebrates. Do you agree with this? Why or why not?
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Outnumber all eukaryotes combined Most pervasive – present in every ecosystem found (EVER!) Thrive where eukaryotes do not (extremophiles) Endured for billions of years So, who is more “important”??? Vital to other organisms: decomposers, nutrient cycling Symbiosis abounds
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Classification Kingdom: Monera? Domain: Bacteria Domain: Archaea 3 typical morphologies •cocci (sphere) •bacilli (rod) •helical (spiral)
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Cell Walls Function Peptidoglycan (unique to D. Bacteria) Combination of Protein and Carbohydrates
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Gram Staining A series of stains applied to bacteria that have been heat fixed onto a slide. The final color is based on the outer coating of the bacteria. Gram+ stain Purple Gram- stain Pink
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Cell Wall differences Gram + Gram -
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Antibiotics- what are they? Chemicals made by one organism to kill another. The oldest type of chemical warfare. We take them to fight off bacterial infections Where do they come from? Decomposers (fungi and bacteria) Why do they make them? Competition for food.
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Antibiotics- How do they work? Prevents the polymer cross-linkages during new wall formation. (binary fission) osmotic pressure lyses the cell (+) Streptomycin & Erythromycin Binds to ribosomes - prevents protein syn (-) Tetracycline: Broad spectrum + & -
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This note was uploaded on 11/16/2011 for the course BIO 101 taught by Professor Martin during the Fall '08 term at Rutgers.

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AP_Bio_-_ch_27_prokaryotes - Prokaryotes & The Origin of...

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