BI-210
Food tests
Biology · Secondary 3 · Medium · Food tests
A food sample is tested with Biuret solution, Benedict’s solution and ethanol followed by water.
Results:
- Biuret: purple
- Benedict’s (after heating): brick‑red precipitate
- Ethanol + water: clear, no emulsion
Which nutrients are present in the food sample?
Results:
- Biuret: purple
- Benedict’s (after heating): brick‑red precipitate
- Ethanol + water: clear, no emulsion
Which nutrients are present in the food sample?
- Protein and reducing sugar only
- Protein and lipid only
- Reducing sugar and lipid only
- Protein, reducing sugar and lipid
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