Question

Energy released by one gram of carbohydrate, fats and protein is

• A. 4.1, 9.45, 5.65 (KCal/gm)
• B. 4.1, 5.65, 9.40 (KCal/gm)
• C. 5.4, 6.5, 8.9 (KCal/gm)
• D. 5.0, 7.8, 10.5 (KCal/gm)

Answer 1

The correct option is A 4.1, 9.45, 5.65 (KCal/gm)

The energy released from food, through the process of cellular respiration is food energy. Food energy is derived from carbohydrates, fats, and proteins, as well as organic acids, polyols, and ethanol present in the diet. The number of calories in a food depends on the amount of energy the food provides. The caloric value of carbohydrate, protein, and fat is 4 kcal/g, 4 kcal/g, 9 kcal/g respectively.

Carbohydrate and fats (lipids) are chief energy source although proteins can also give energy.