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

Testing for biological molecules — practice question

Many flowers make a sugary fluid known as nectar. Bees given nectar use enzyme Q to convert the nectar into honey. When a nectar sample was checked for reducing sugar with standard laboratory reagents, it was blue. When a honey sample was checked in the same way, it was orange. Which conclusion about the reaction catalysed by enzyme Q is consistent with these results?

  • Acondensation; substrate: maltose; product: glucose
  • Bcondensation; substrate: sucrose; product: fructose
  • Chydrolysis; substrate: sucrose; product: fructose
  • Dhydrolysis; substrate: maltose; product: glucose

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