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Macromolecules

Macromolecules - minutes(2ml substance 2ml Benedict’s •...

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Macromolecules Introduction ?Four classes ?carbohydrates ?proteins ?lipids ?*nucleic acids * not studied
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Carbohydrates CHO ?glycosidic linkage is between 2 sugars groups ?monosaccharides ?disaccharides ?*oligosaccharides(not studied) ?polysaccharides
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Carbohydrates, cont. ?Monosaccharides?glucose, fructose, galactose ?Disaccharides?maltose (glucose- glucose)?lactose (glucose- galactose)?sucrose (glucose-fructose) ?Polysaccharides enzymes ?starch (potato starch maltose)
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Carbohydrates Reducing Sugars Redox ?red = reduction (gain electrons) ?ox = oxidation (lose electrons) ?reducing sugar - reducing agent, donates electrons to reduce a molecule ?all monosaccharides, some disaccharides
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Benedict’s Test for Red. Sugars Cu ++ with red. Sugar gives Cu + + (reduced) and Sugar(ox) Benedicts ?Procedure:boil solution for 3
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Unformatted text preview: minutes(2ml substance + 2ml Benedict’s) • ?? blue -ve • ? green + • ? yellow ++ • ? orange +++ • ? red/brown++++ Proteins • CHON • ?monomer • ?amino acid, 20 • ?amino acid structure • ?central C atom, amino group, carboxyl group, • H atom, R group • ?peptide bond is between 2 a.a. Carbohydrates • Iodine Test for Starch • Procedure:?1 ml Iodine + 2 ml substance • ?results • ?blue-black +ve • ?yellow-brown-ve Biuret Test for Proteins • ?Procedure • Mix 2ml substance + 2 ml Biuret • ?results • ?light blue - ve • ?slight purple + • ?deep violet ++ Sudan IV Test • Procedure • ?oil + water = emulsion • ?add Sudan IV, which layer does it stain? • ?add detergent (emulsifier), what • happens? • ?oil droplets are suspended in water...
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Macromolecules - minutes(2ml substance 2ml Benedict’s •...

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