EVERYDAY SCIENCE

Detailed explanation-1: -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-2: -Fat has the highest calorie. The calorie value of carbohydrate and protein is 4 kcal/g whereas calorie value of fat is 9 kcal/g.

Detailed explanation-3: -The amount of energy stored as lipids is greater than the amount stored as glycogen since the human body cannot store as much glycogen as lipids can.

Detailed explanation-4: -Fat contributes more than twice as much-about 9 calories per gram. Alcohol, although not a nutrient, also supplies energy-about 7 calories per gram. Foods that are high in fat are also high in calories. However, many lowfat or nonfat foods can also be high in calories.

Detailed explanation-5: -Carbohydrates provide just 4 kilocalories of energy per gram, while lipids provide 9 kilocalories per gram. When the electrons around the carbon atoms in fatty acids are transferred to oxygen, a greater amount of energy is freed than when the identical process happens with carbs.