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BiologicalMolecules160-page7

BiologicalMolecules160-page7 - Disaccharides •...

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Biological Molecules - 7 Given the rules, there are many variations possible with monosaccharides. Many isomers are possible and common. The common monosaccharides of living organisms are: C 6 H 12 O 6 (glucose, galactose, fructose) Some 5-carbon (ribose, deoxyribose, ribulose, xylose) Note: Although we show monosaccharides and other carbohydrates in the chain structure, the carbohydrates in living organisms are found in a ring shape. Formation of Disaccharides and polysaccharides
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Unformatted text preview: Disaccharides • Disaccharides are 2 monosaccharides joined by a dehydration synthesis, or condensation, which is the removal of a water molecule. The "H" is taken from a hydroxyl functional group of one monosaccharide and the "OH" from the second. The two molecules are then joined by a C—O—C bond. Examples of common disaccharides are sucrose, lactose, and maltose...
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