What do proteins contain that is essential for various bodily functions?

Proteins are vital macromolecules that are essential for various bodily functions, and they are composed of long chains of amino acids. These amino acids serve as the building blocks of protein, allowing the body to build and repair tissues, produce enzymes, hormones, and other important biochemicals. Among the amino acids, there are essential amino acids that the body cannot synthesize and must be obtained through diet.

While simple carbohydrates, fatty acids, and vitamins are important for overall health, they do not make up proteins or have the same role in terms of structural functions and metabolic activities. Therefore, understanding that proteins specifically contain amino acids is key in recognizing their importance in various physiological processes.