Biology 9700 · AS & A Level · Factors that affect enzyme action

Factors that affect enzyme action — practice question

Diastase is an enzyme which converts starch into maltose. A starch sample is treated with boiled diastase and then left for 15 minutes. The resulting mixture is tested using iodine solution and Benedict’s solution. Which outcome is correct?

  • Aiodine solution: blue-black; Benedict’s solution: blue
  • Biodine solution: blue-black; Benedict’s solution: red
  • Ciodine solution: brown; Benedict’s solution: blue
  • Diodine solution: brown; Benedict’s solution: red

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