Question

A healthy person eats the following diet 5 gm raw sugar, 4 gm albumin, 10 gm pure buffalo ghee adulterated with 2 gm vegetable ghee, and 5 gm lignin. How many calories he is likely to get

• A. 164
• B. 12
• C. 144
• D. 126

Answer 1

The correct option is C 144

• Physiological calories obtained from different food substances are - Carbohydrates give 4.0Kcal/g, Proteins give 4.0Kcal/g while fats give 9.0Kcal/g.
• So, energy from 5g sugar = 5 x 4Kcal = 20Kcal
• Energy from 4g albumin = 4 x 4Kcal = 16Kcal
• energy from 10g+2g fat = 12 x 9Kcal = 108Kcal
• lignin cannot be digested by humans because of the absence of digestive enzyme for lignin so no calories will be obtained from them. Ruminants are capable of digesting lignin.
• Adding all the above-obtained values we get 144Kcal.