BI-41
Food tests
Biology · Secondary 3 · Medium · Food tests
A student tests a food sample. Benedict’s test gives a brick-red precipitate, the biuret test remains blue, the ethanol emulsion test forms a white emulsion, and the iodine test stays brown. What does the sample mainly contain?
- Boiled rice (mainly starch).
- Cheese (mainly protein and fat).
- Honey mixed with vegetable oil (mainly sugar and fat).
- Lean meat (mainly protein).
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