Biology 9700 · AS & A Level · Testing for biological molecules

Testing for biological molecules — practice question

The Benedict’s test and ethanol emulsion test were performed on a sample of biological molecules. During the Benedict’s test, the solution turned brick-red, and in the ethanol emulsion test it became cloudy. Which molecules were present in the sample?

  • Areducing sugars and lipids
  • Bproteins and reducing sugars only
  • Cstarch, proteins and reducing sugars
  • Dnon-reducing sugars and lipids

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