BI-1248
Food tests
Biology · Secondary 4 · Easy · Food tests
A student wants to test a food sample for protein.
Which reagents and observation would correctly show that protein is present?
Which reagents and observation would correctly show that protein is present?
- Add sodium hydroxide and copper(II) sulfate; a purple colour appears.
- Add iodine solution; a blue-black colour appears.
- Add Benedict’s solution and heat; a brick-red precipitate forms.
- Add ethanol and water; a cloudy white emulsion forms.
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