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JAMB Biology 1980 Question 18

Question 18

Food Substances and Enzymes

In testing for glucose the necessary reagent and the condition under which the reagent reacts best are

  1. A.Fehling's reagent, in the cold
  2. B.Millon's reagent, boiled
  3. C.Fehling's reagent in acid medium, heated
  4. D.iodine solution, boiled
  5. E.Fehling's reagent in neutral or alkaline medium, boiled.
Show the answer and explanation

Answer: E (Fehling's reagent in neutral or alkaline medium, boiled.)

Explanation

Glucose, a reducing sugar, gives a brick-red precipitate when boiled with alkaline Fehling's solution.