Question

The energy content in Kcal/g of carbohydrate: protein: triglyceride respectively is approximately in the ratio of
A) 1: 2: 2
B) 1: 1: 2
C) 2: 1: 1
D) 2: 2: 1

Answer 1

Hint: Food's energy content is a crucial factor to consider. The food we consume provides the energy our body needs for exercising, talking, and thinking.

Complete answer:
Carbohydrates are a form of macronutrients that can be found in a variety of foods and drinks. The majority of carbohydrates are found in plant-based foods like grains. Carbohydrates are often added to packaged foods in the form of starch or added sugar by food producers.

Protein is a basic structure made up of a series of amino acids. Protein is needed in our diet for our body to repair and replace cells. Protein is also essential for children's, adolescent's, and pregnant women's growth and development.

In our blood, triglycerides are a form of fat (lipid). Our bodies turn any calories that aren't used right away into triglycerides when we eat. Triglycerides can be found in our bodies' fat cells. Hormones then release triglycerides to provide nutrients in between meals.
The energy content of carbohydrates in Kcal/g is 4.
The energy content of protein in Kcal/g is 4.
The energy content of triglycerides in Kcal/g is 8.
Therefore, the energy content of carbohydrate: protein: triglyceride in kcal/g is approximately in the ratio of $4: 4: 8 = 2: 2: 4 = 1: 1: 2$.

Thus the correct answer is option ‘B’.

Note: The energy content of triacylglycerol is lower than that of carbohydrates. It is because triacylglycerol requires much less oxygen than carbohydrates, which have half the mass but almost no metabolic energy. Protein's energy density is also reduced by the oxygen, nitrogen, and sulphur it contains.