FOOD CHEMISTRY
CARBOHYDRATES PROTEINS AND LIPIDS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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9 kcal/g
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6 kcal/g
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0 kcal/g
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4 kcal/g
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Detailed explanation-1: -It uses a single factor for each of the energy-yielding substrates (protein, fat, carbohydrate), regardless of the food in which it is found. The energy values are 17 kJ/g (4.0 kcal/g) for protein, 37 kJ/g (9.0 kcal/g) for fat and 17 kJ/g (4.0 kcal/g) for carbohydrates.
Detailed explanation-2: -Each gram of carbohydrate in food provides four calories of energy.
Detailed explanation-3: -The calories in food come from carbohydrates, proteins, and fats: A gram of carbohydrate has 4 calories. A gram of protein has 4 calories. A gram of fat has 9 calories-more than twice as much as the other two.
Detailed explanation-4: -Carbohydrate Calories The average for carbohydrate is given as 4.2 kcal per gram gross energy, and the net energy for humans is the same. There is no way to give the exact calories per gram of carbohydrate, though. The actual amount of energy from any carbohydrate varies depending on the shape of the molecule.