Biology 0610 · IGCSE · Biological molecules

Biological molecules — practice question

Four separate foods were tested to determine what they contained. The outcomes are shown in the table. Which food has protein but does not have reducing sugar or starch?

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

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