Answer: Proteins are large, complex molecules that play many critical roles in the body. They do most of the work in cells and are required for the structure, function, and regulation of the body's tissues and organs.
Step-by-step explanation:
What Is Main Purpose of Protein in Living Things?
Muscle Mass. The building blocks of proteins are amino acids.
Cell Formation. Every cell in your body has some protein in it.
Tissue Maintenance and Repair. You need protein to help your body repair cells and create new ones.
Enzymes and Hormones.
Energy Source.