Biology 0610 · IGCSE · Biological molecules

Biological molecules — practice question

The information gives the concentrations of sugar and starch in an onion. The onion is then tested using Benedict’s solution and iodine solution. Which set of test results is correct?

  • ABenedict’s solution: blue; iodine solution: blue-black
  • BBenedict’s solution: blue; iodine solution: brown
  • CBenedict’s solution: brick red; iodine solution: blue-black
  • DBenedict’s solution: brick red; iodine solution: brown

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