Biology Homework Help :) Watch
Research and write-up methods for testing for biological molecules: Starch, protein, lipids, reducing sugar and non-reducing sugar.
(Btw, didn't they mention iodine for starch, the piece-of-paper test for lipids, etc?)
Whens the homework due in?
Reducing sugar - Add Benedict's reagent to sample / heat / brick red precipitate if reducing sugar present.
Non reducing sugar - Add HCl to fresh sample / Heat / neutralise / test with Benedict's reagent / brick red precipitate as non reducing has been hydrolysed into reducing
Starch - iodine test / blue Black if starch present
Protein - biuret reagent / violet if proteins are present (this test will also test positive for ENZYMES)
Lipids - Add solution and shake / add water / mily/cloudy white emulsion formed if lipids are present.
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