Question on: WAEC Biology - 2005
Which of the following substances has the highest amount of energy in joules per unit weight?
A
Carbohydrates
B
Proteins
C
Fats
D
Vitamins
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Correct Option: C
Fats and ethanol have the greatest amount of food energy per mass, 37 and 29 kJ/g (8.8 and 6.9 kcal/g), respectively. Proteins and most carbohydrates have about 17 kJ/g (4 kcal/g)
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