Explain how proteins carry out a protective function?

One of the functions of proteins is protective. Protein is the building block from which most cell structures are made. Proteins form protective cells in the body. They are accordingly capable of attacking various enemy organisms and substances that should not be in the body. Also, proteins form special organelles to protect cells. These are primarily lysosomes. They protect the cell from the inside, and also perform a digestive function due to the presence of digestive enzymes inside.