Question

A boy was interested in calculating the number of calories in his diet. He ate the following items in the diet.
$\begin{array}{cc}\text{Items}& \text{Weight of each item}\\ \text{Carbohydrates (from rice)}& \text{6 g}\\ \text{Pure Ghee}& \text{8 g}\\ \text{Lignin}& \text{3 g}\\ \text{Albumin}& \text{5 g}\\ \text{Vegetable Ghee}& \text{2 g}\end{array}$
What is the total calories he is likely to have consumed (Kcal)?

• A. 161
• B. 146
• C. 122
• D. 134

Answer 1

The correct option is D 134

The physiological calorific value is the actual amount of energy liberated by the consumption of 1 gram of carbohydrates, fats and proteins.

The physiological calorific values for different nutrients are provided below.
$\begin{array}{cc}\text{Categories}& \text{Physiological calorific value (Kcal/g)}\\ \text{Carbohydrates}& \text{4.0}\\ \text{Fats}& \text{9.0}\\ \text{Proteins}& \text{4.0}\end{array}$
Thus the total calories consumed by the boy in his diet can be calculated as follows:

Calories from carbohydrates = 6 $\times$ 4=24 Kcal
Calories from pure ghee =8 $\times$ 9=72 Kcal
Calories from lignin = 0 Kcal
Calories from albumin =5 $\times$ 4=20 Kcal
Calories from vegetable ghee =2 $\times$9= 18 Kcal
Total calories = Sum of the calories from all sources =24+72+20+18 = 134 Kcal