Lecture 12.Feb17 - BIO 311C Spring 2009 Lecture 12...

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BIO 311C Spring 2009 Lecture 12 – Wednesday 18 Feb. 1
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Definition: A carbohydrate is a simple sugar, a modified sugar, or a polymer of a sugar. Thus, in order to understand carbohydrates it is necessary to understand sugars. * 2
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Description of a simple sugar A simple sugar consists of a chain (usually unbranched with 3 - 7 carbon atoms), with the following characteristics: 1. One of the carbon atoms occurs as an aldehyde or else a ketone functional group. 2. Each of the other carbon atoms occurs as an alcohol functional group 3. Hydrogen atoms are attached to all other positions on the carbon atoms in order to satisfy their covalencies. * 3
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