ch369_sp11_membrane_notes

ch369_sp11_membrane_notes - Clicker question Two different...

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Clicker question Two different species of bacteria have been isolated from very different environments: one, a hot spring with an average water temperature of 40 °C, the other a glacial lake with an average water temperature of 4 °C. Which species would be expected to have more unsaturated fatty acids in its membrane lipids? A) the species isolated from a hot spring. B) the species isolated from a glacial lake.
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Today’s topics - Membranes & energetics of transport. This is from chapter 9 of the 2nd edition, (or second half of chapter 8 in the 1st edition)
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Uniport - specific for one type of molecule. Symport - transports 2 molecules together. Antiport - transports 2 molecules in opposite directions.
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Red blood cell glucose transporter (passive transport, no ATP needed).
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Active transport requires energy (often provided by ATP hydrolysis). Can work against a concentration gradient. Example of active transport: Na+/K+ pump. 3 Na + ions bind to transporter protein inside cell.
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