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WAEC Biology 2004 Question 17

Question 17

Excretion

A urine sample of a patient, tested with Benedict/Fehling solution, gave an orange coloured precipitate, indicating the presence of

  1. A.glucose
  2. B.sucrose
  3. C.lactose
  4. D.maltose
Show the answer and explanation

Answer: A (glucose)

Explanation

An orange/brick-red precipitate shows a reducing sugar. The sugar found in urine, e.g. in diabetes, is glucose.