BI-1383
Food tests
Biology · Secondary 4 · Hard · Food tests
In an investigation, students test for the presence of starch, reducing sugar, protein and fat in a food sample.
Which row correctly shows the reagent used and the positive result for each food test?
Which row correctly shows the reagent used and the positive result for each food test?
- starch: iodine, blue-black; reducing sugar: Benedict’s, brick-red; protein: biuret, violet; fat: ethanol, white emulsion
- starch: Benedict’s, brick-red; reducing sugar: iodine, blue-black; protein: biuret, violet; fat: ethanol, colourless
- starch: iodine, brown; reducing sugar: Benedict’s, blue; protein: biuret, violet; fat: ethanol, white emulsion
- starch: iodine, blue-black; reducing sugar: Benedict’s, blue; protein: biuret, blue; fat: ethanol, white emulsion
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