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

Options

A. 1 gm of fat
B. 1 gm of protein
C. 1 gm of glucose
D. 0.5 gm of protein +0.5 gm glucose

Explanation

To determine which substrates release more energy upon oxidation, we need to consider the energy yield of different macromolecules. The general order of energy release from oxidation is as follows:

1. **Proteins**: When oxidized, proteins yield about 4 kcal/g.
2. **Carbohydrates (like glucose)**: Carbohydrates yield about 4 kcal/g as well.
3. **Fats**: Fats are more energy-dense, yielding about 9 kcal/g.

Now, let's arrange the given substrates in ascending order based on their energy release upon oxidation.

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