Identification of Biomolecules LAB TEST RESULTS

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    18-Jan-2016

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Here are the expected results from the biomolecules lab.

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<ul><li><p>IDENTIFICATION OF BIOLOGICAL MOLECULES CHEMICAL LAB TESTS </p><p>1 | P a g e </p><p> Benedicts Reagent - A Test for Simple Sugars (monosaccharides and some disaccharides) Upon heating, Benedicts Reagent for 4-6 minutes in a boiling water bath, a small amount of sugar in the sample will turn yellow-green and a large amount of sugar will turn orange to brick red. </p><p>Lugols Iodine - A Test for Starch (a polysaccharide) Lugols Iodine (Iodine Potassium Iodide Solution) will turn deep blue-black to purple-black in the presence of starch. </p><p>( - ) (+) (++) (+++) (++++) </p><p> ( - ) ( + ) </p></li><li><p>IDENTIFICATION OF BIOLOGICAL MOLECULES CHEMICAL LAB TESTS </p><p>2 | P a g e </p><p> Biuret Solution A Test for Proteins (peptide bonded molecules) Biuret Solution contains sodium hydroxide and copper sulfate which, upon heating, reacts with the peptide bonds in proteins to give an attractive purple color. </p><p> Brown Paper Test - A Test for Lipids (fats, oils and waxes) Lipids will leave an oily, translucent smear when absorbed into brown paper. This is easier to see when held up to a light or sunny window. </p><p>( - ) ( - ) ( + ) </p><p>( + ) ( - ) </p></li></ul>

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