O-LevelBiologyHuman Nutrition5090/11 · May/June 2022 · Q101 Mark
Four food tests were each carried out on four different white powders, A, B, C and D. The results are shown in the table. Which powder contains a carbohydrate, a fat and a protein?
ABenedict's test: blue colour, Biuret test: violet colour, Ethanol emulsion test: milky, Iodine solution test: blue-black colour
BBenedict's test: orange colour, Biuret test: blue colour, Ethanol emulsion test: milky, Iodine solution test: blue-black colour
CBenedict's test: red colour, Biuret test: violet colour, Ethanol emulsion test: clear, Iodine solution test: yellow colour
DBenedict's test: green colour, Biuret test: blue colour, Ethanol emulsion test: clear, Iodine solution test: yellow colour
✓ Correct answer
A: Benedict's test: blue colour, Biuret test: violet colour, Ethanol emulsion test: milky, Iodine solution test: blue-black colour
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