Correct Answer - Option 2 : fat
The correct answer is: 'B'.
- Food contains mainly protein, carbohydrates, fats, vitamins, minerals, dietary fibre and water.
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Fat and ethanol have the greatest food energy per mass, 9 and 7 kcal/g, respectively.
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Protein and carbohydrates have approximately 4 kcal/g.
Thus, the correct answer is: "Fat".
- Organisms derive energy from carbohydrates, fats and protein.
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Calorific value is the amount of energy released when one gramme of these food ingredients is burned. Thus, the calorific value of food reveals how much energy the human body can obtain from it through metabolism.
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Fats are the slowest source of energy, yet they are also the most energy-efficient.
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Fat provides the body with roughly 9.5 kcal / g, which is more than double the amount provided by proteins or carbohydrates.
- In our diet, fats provide the most concentrated source of energy.
- Fat has the highest energy content of all the food components, yielding 9 kcal per gramme.
- Carbohydrates and proteins both produce roughly the same amount of energy, which is 4 kcal/g.
