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Identification of Biologically Important Compounds
Starch
Add substance under test to a test tube
Add 2 drops of iodine in potassium iodide solution
Results: blue/black colour indicates present of starch

Reducing Sugar
Add substance under test to a test tube
Add a few drops of Benedict's Reagent
Shake and boil…

Page 2

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Identification of Biologically Important Compounds
Protein
Add substance under test to a test tube
Add a few drops of Biuret reagent
Warm gently
Results: Purple colour indicates protein
If a yellow precipitate is obtained there is a lot of sugar
present masking the result.
Dip an albustix reagent strip into…

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