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JAMB Biology 1993 Question 15

Question 15

Food Substances and Enzymes

Osmic acid boiled with a solution of food substance gave a black precipitate. This indicates the presence of

  1. A.fats and oils
  2. B.proteins
  3. C.amino acids
  4. D.starch.
Show the answer and explanation

Answer: A (fats and oils)

Explanation

Osmic acid (osmium tetroxide) turns black with fats and oils, so it is a test for lipids.