BI-1322
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: yellow-brown.
Which conclusion about the sample is correct?
Which conclusion about the sample is correct?
- Reducing sugar is present but protein, fat and starch are absent.
- Reducing sugar and protein are present but fat and starch are absent.
- Only starch is present in the sample.
- Protein and fat are present but reducing sugar is absent.
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