Biology 1501 Class 2 notes

Biology 1501 Class 2 notes - Biology 1501 Class#3 notes...

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Biology 1501 Class #3 notes - kink in tail wherever a double bond, therefore take up more space (unsaturated) Phospholipids - phospholipids (two fatty acids attached) - gives membrane structure (arrangement to minimize contact, hydrophilic head interacts with water) – phospholipids - ball and stick model to draw membranes - fatty acid tails - amphipathic nature (one end hydrophilic, one hydrophobic) results in the arrangement (causes lipid bilayer… thermodynamically stable layer) - b/w the tails, lots of cholesterol and proteins (yellow area between on diagram) Proteins - move molecules across lipid bilayers (transport function) - proteins help with movements - antibodies are proteins - string together amino acids to make polypeptides - 20 amino acids used to make proteins - polypeptide is a string of amino acids - a protein is 1+ polypeptide - amino acids must have an amino group and a carboxyl group - group that sticks out (causes them to differ, the “R” group) - are group can be acidic, basic, hydrophobic, hydrophilic, etc.
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