What is the reason for the multifunctionality of protein molecules?

Protein molecules are made up of amino acids, while amino acids are made up of nucleotides. Nucleotides form many combinations, resulting in a huge variety of proteins. Although there are only twenty essential amino acids, combinations of these amino acids give a great deal of genetic diversity.

With such a wide variety, proteins are also distinguished by their great versatility, This is also due to the fact that there are several structures. Primary, secondary, tertiary and quaternary. Each of these structures is more complex than the previous one and performs different functions.