BIOL 1103 1st Edition Lecture 6 Outline of Last Lecture II ose Sugars III Calories IV Lipids Outline of Current Lecture V Cholesterol a Saturated and trans fats b Hydrogenation VI Steroids VII Phospholipids VIII Protein Structure Current Lecture Cholesterol o Cholesterol is a lipid and protein combo o High Density cholesterol HDL good cholesterol Happy cholesterol clears cholesterol from system by taking it to liver o Low Density cholesterol LDL bad Lousy cholesterol carries cholesterol from liver to heart o LDL can get into arteries form plaque cause heart disease o Cholesterol is a waxy fat o Omega 3 fatty acids are healthy because they raise HDL levels reduce growth of fatty deposits omega end omega 3 double bond 3 from the end Found in fish flaxseed oils o Saturated fats hydrogen atom attached to every carbon raise LDL levels o Trans fats raise LDL levels o Hydrogenation adding hydrogen to double bonds in unsaturated fats and this makes them semi solid Oleomargarine is white after hydrogenated and then yellow dye is added Crisco is hydrogenated oil Hydrogenation forms trans fats o Healthful to most harmful fats These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute Fats with omega 3 mono polyunsaturated fats saturated fats trans fats Steroids o Classed as lipids because they re insoluble in water o Made of carbon and hydrogen o Side chains make steroids unique o Estrogen testosterone cholesterol natural steroids o Anabolic steroids used to help build muscle Phospholipids o Make up cell membrane o Polar head and nonpolar tail o When immersed in water polar heads stick in water and nonpolar tails steer away from water o Phospholipid bilayer makes up cell membrane The more hydrogen you have the more energy you have Proteins are polymer version of amino acids Protein structure o Primary structure its sequence of amino acids o Secondary structure shape corkscrew coil o Tertiary structure where it folds on itself o Quaternary structure formed by hemoglobin linking many polypeptides together o Enzymes are types of proteins
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