Biology 311C Lecture 5

Biology 311C Lecture 5 - September 2, 2011 Biology 311C...

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September 2, 2011 Biology 311C Lecture 5 The biochemistry of Lipids The three main types of lipids are fats, phospholipids, and steroids. Bonds between carbon and hydrogen are energy rich. The functional group on a fatty acid is the carboxyl. It’s a carbon double bonded to a hydrogen and that hydrogen is bonded to a HO. The bond formed from the dehydration reaction is an ester bond between a triglycerol molecule and fatty acid molecule. It has a saturated fatty acid tail and we know it is because there are no double bonded between carbon atoms which means each carbon atoms is attached to as many hydrogens as possible. They are also in a straight line. Saturated fats are solid in room temperature and unsaturated fats are liquid. Saturated fats come from animals and unsaturated fats come from plants. Unsaturated fats are liquid in room temperature because the fatty acid can’t get to the double bond to keep together and they have a lower melting point. Saturated fats can harden your arteries and create plaque which slows down the flow of
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This note was uploaded on 02/21/2012 for the course BIO 311 C taught by Professor Mcclelland during the Fall '09 term at University of Texas.

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