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The three main food groups and their structures
Member rating: No Rating | Words: 1281 | Submitted: Tue Mar 11 2008
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The three main food groups and their structures Carbohydrates: Carbohydrates contain the elements carbon, hydrogen and oxygen as their name suggests. Carbohydrates are comprised of monosaccharides, disaccharides and polysaccharides. Each monosaccharide is structural and/or optical isomer of glucose (C6H12O6) Monosaccharides are single sugar units and have between three and ten carbon atoms per molecule monosaccharides include alpha glucose, beta glucose and fructose. Alpha glucose Beta glucose Fructose Disaccharides are two monosaccharides which formed in a condensation reaction to produce glycosidic bonds joining the two monosaccharides together and water being produced as a by product. This is also a reversible reaction and the process of hydrolysis can form two monosaccharides. In a condensation reaction 2 hydrogen atoms and one oxygen atom (per molecule!) react to produce water, leaving the other monosaccharide with one oxygen atom which is free to bond with the other monosaccharide producing either a 1,4, a 1,2 or a...
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