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Which of the following substances has the highest amount of energy in joules per unit...

Biology
WAEC 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 Answer: Option C
Explanation
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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