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WAEC Biology 2013 Question 30

Question 30

Food Substances and Enzymes

The correct arrangement of food classes of the same quantity in the order of magnitude of energy value to animals in descending order is

  1. A.Carbohydrates, fats and oils, water, protein.
  2. B.Fats and oils, carbohydrates, protein, water.
  3. C.Water, fats and oils, carbohydrates, protein.
  4. D.Protein, fats and oils, water and carbohydrates.
Show the answer and explanation

Answer: B (Fats and oils, carbohydrates, protein, water.)

Explanation

Fats give about twice as much energy per gram as carbohydrates and proteins; water gives none.