Carbohydrate Lecture PPT

Carbohydrate Lecture PPT - Carbohydrates A. General 1....

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Carbohydrates A. General 1. Composed of the elements carbon, hydrogen and oxygen. 2. The hydrogen and oxygen are present in a 2:1 ratio. 3. Can be grouped as monosaccharide, disaccharides and polysaccharides
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B. Monosaccharide 1. Simple sugars 2. Soluble in water 3. Sweet 4. Forms crystals 5. Most important in nutrition are those with 5 or 6 carbons - the pentoses and the hexoses (ose=sugar)
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6. The most common simple sugars are: Glucose Fructose Galactose OH | H- C =O H- C -H H- C =O H- C -OH C =O H- C -OH HO-C -H HO- C -H HO- C -H H- C -OH H- C -OH HO- C -H H- C -OH H- C -OH H- C -OH H- C -H H- C -H H- C -H | | | OH OH OH
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C. Disaccharides 1. Two simple sugars coupled by removing water 2. Four common disaccarhides: Sucrose = Glucose + Fructose Maltose = Glucose +Glucose Lactose = Glucose + Galactose Cellobiose = Glucose +Glucose
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D. Polysaccharides 1. Long chains of sugar molecules 2. Some common polysaccharides are: A. Starch 1. Amylose - unbranched 2. Amylopectin - branched N(maltose) a 1-4 linkage 24-30 glucose per non reducing end group. 50,000-400,000 Daltons.
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B. Glycogen 1. Same basic structure as starch. Comes from animals. 8-12 glucose per nonreducing end group.
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This note was uploaded on 10/01/2008 for the course ANSC 113 taught by Professor Andrews during the Fall '08 term at UConn.

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Carbohydrate Lecture PPT - Carbohydrates A. General 1....

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