BI-1332
Food tests
Biology · Secondary 4 · Hard · Food tests
A student tests a food sample with Benedict’s solution, biuret solution, ethanol emulsion and iodine solution. The observations are:
- Benedict’s: brick-red
- Biuret: blue
- Emulsion: clear
- Iodine: blue-black
Which conclusion about the sample is correct?
- Benedict’s: brick-red
- Biuret: blue
- Emulsion: clear
- Iodine: blue-black
Which conclusion about the sample is correct?
- Reducing sugar and starch are present; protein and fat are absent.
- Reducing sugar and protein are present; starch and fat are absent.
- Only starch is present; reducing sugar, protein and fat are absent.
- Protein, starch and fat are present; reducing sugar is absent.
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