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JAMB Biology 2019 Paper

Question : 36

Total: 80

Solution:

Concept:

Energy density refers to the amount of energy stored in a given weight of a food substance.

Explanation:

Fats yield about

37\ \text{kJ/g}

, while carbohydrates and proteins each yield about

17\ \text{kJ/g}

Vitamins provide no usable energy for metabolism.

Since

37\ \text{kJ/g} > 17\ \text{kJ/g}

, fats supply the greatest energy per unit weight.

Answer:

B. Fats

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