Which is a difference between proteins and carbohydrates and fats

Subject : Biology

Question:

Which is a difference between proteins and carbohydrates and fats?

A) proteins are macromolecules; carbohydrates and fats are not.

B) proteins are composed of monomers; carbohydrates and fats are not.

C) carbohydrates and fats contain carbon, hydrogen, and oxygen; proteins do not.

D) excess carbohydrates and fats are stored; excess proteins are not.

Expert Verified Solution:

The correct answer:  D) excess carbohydrates and fats are stored; excess proteins are not.

Explanation: Proteins are macromolecules made up of amino acids, which the body uses for building and repairing tissues. Unlike carbohydrates and fats, the body does not store excess proteins for future use. Instead, excess proteins are broken down, and their components are either used immediately for energy or excreted.

Carbohydrates and fats are composed of carbon, hydrogen, and oxygen, and they serve as primary energy sources for the body. Excess carbohydrates are stored as glycogen in the liver and muscles, while excess fats are stored in adipose tissue for long-term energy reserves.