Lecture_18%2619_notes

Lecture_18%2619_notes - CHM 115 Lecture 18/19 (03-24-09)...

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1 CHM 115 Lecture 18/19 (03-24-09) Biochemistry
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2 Reading for this and next lecture: Biochemistry Interchapter, pp 530-544; page 506, carbohydrates only
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3 Chemistry and Biochemistry Where we’ve been: ionic and covalent bonding molecular shape intermolecular forces Where we’re going: How bonding and IMF’s determine shape How shape determines biological function amino acids / proteins / nucleic acids
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4 Lipids: fats Flipped structure Fats are esters of carboxylic acids & glycerine CH 2 (OH)CH 2 (OH)CH 2 (OH)
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5 Metabolic studies have shown that trans fats have adverse effects on blood lipid levels--increasing LDL ("bad") cholesterol while decreasing HDL ("good") cholesterol. This combined effect on the ratio of LDL to HDL cholesterol is double that of saturated fatty acids.3 Stearic acid (saturated)
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6 Zero calorie fat: Olestra Glycerine Stearic acid Sucrose
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Carbohydrates Carbohydrates are the most abundant class of organic compounds found in living organisms. They originate as products of photosynthesis, an endothermic condensation of carbon dioxide and water requiring light energy and catalyzed by the pigment chlorophyll. n CO
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Lecture_18%2619_notes - CHM 115 Lecture 18/19 (03-24-09)...

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