Which of the following will release more energy on oxidation? Arrange them in ascending order.

a. 1 gm of fat

b. 1 gm of protein

c. 1 gm of glucose

d. 0.5 g of protein + 0.5g glucose

The caloric value of 1 gm fat = 9.45 kcal/gm

The caloric value of 1 gm protein= 5.65 kcal/gm

The caloric value of 1 gm glucose which is a carbohydrate is = 4.1 kcal/gm

And caloric value of 0.5 g of protein + 0.5g glucose = 5.65/2 + 4.1 / 2 = 9.75 / 2 = 4.875 kcal/gm

Therefore, arranging them in ascending order based on their oxidation energy:

1 gm of glucose < 0.5 g of protein + 0.5g glucose < 1 gm of protein < 1 gm of fat.