Some of the chemicals that make up living organism have only few structures (like DNA) other have many different structures (like proteins). Why might this be the case?

Answer:Proteins have many different functions, while DNA has limited functions.

Explanation:

Chemicals that make up the living organisms consists of more protein than DNA. This is because proteins have different functions while the function of DNA are limited. Excluding water and fat, the human body is made up almost entirely of protein. Most of the structural framework of the body such as bones, muscle, organs, skin and nails are made up of protein.

Protein are responsible to do most of the work in cells by acting as enzymes, hormones and carriers. Proteins are largely required for the structure, function, and regulation of the body's tissues and organs.