Question

Which one of the following gives maximum energy in metabolic processes?
A. Proteins
B. Vitamins
C. Carbohydrates
D. Lipids

Answer 1

Hint: To answer this question we have to know about energy sources in the metabolic process. Carbohydrates, protein, and lipids are the energy source in our body but lipids give the maximum energy in the metabolic process of our body.

Complete Step by Step Solution:
The lipids present in the animal and human body give maximum energy in the metabolic processes. On reduction lipids get converted into fatty acids. Thus, the energy content of fat or lipids is nearly twice that of carbohydrates and proteins.

Protein is a naturally occurring and extremely complex substance that consists of amino acid residues. Proteins are present in all living organisms. Protein is the most important essential constituent of diet because protein is the main food for bodybuilding. Proteins do most of the work in cells and they are required for the function, structure, and regulation of the tissues and organs of the body.

Carbohydrate is a compound of carbon, hydrogen and oxygen. It is an essential constituent of body but not an important essential constituent of diet as it helps in gaining weight. Carbohydrate is present in beans, milk, vegetables etc. It supplies energy to our body.
Vitamins are the essential constituent of our body. It functions in many essential works of our body.
Thus the correct option is D.

Note: On reduction lipid breaks into fat. Fat acts as the energy bank in our body. Fat is solid lipid. It is generally present below the dermis of our skin as subcutaneous fats.