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12 Cards in this Set
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- Back
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what is the fluid mosaic model?
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How the plasma membrane is organized, at room temp, a fluid bilayer of phospholipid molecules surround the cell and have a consistency of light olive oil.
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What are suspended within the fluid bilayer that are able to change their position by moving laterally?
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protein molecules
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What lends support to the membrane?
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cholestrol
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What are attached to the outer surface of some protein and lipids?
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short chains of sugars (called glycoproteins and glycolipids)
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What are glycoproteins and glycolipids?
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short chains of sugars that are attached to the outer surface of some proteins and lipids.
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What are identifying tags used for blood typing and are specific to each individual?
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carbohydrate chains (glycoproteins and glycolipids)
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What are some of the unique features of carbohydrate chains?
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The are specific to each cell, mark it as belonging to a particular individual, also account for blood type and rejection of incompatible organ transplants, they may act as receptors for hormones.
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What are the short chains of sugars attached to the outer surface of some protein and lipids? Why are they important (what 3 functions do they serve)?
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glycoproteins and glycolipids, respectively), these carb chains, are identifying tags: used for blood typing, also responsible for tissue type and to account for rejection of incompatible organ transplants. They also may act as receptors for hormones.
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What are the 3 functions of a plasma membrane protein?
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form channels through which certain substances can enter cells; others are enzymes that catalyze reactions or carriers involved in the passage of molecules through the membrane.
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what form channels throughs which certain substances can enter cells?
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plasma membrane protein
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What could be an enzyme that catalyzes reactions or carriers involved in the passage of molecules through the membrane?
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plasma membrane protein
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What is the gate keeper of the cell?
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the plasma membrane
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