What are the functions of proteins?


Proteins are molecules that have various critical functions in the body. The functions proteins play may be listed as: structural component, enzyme, messenger, antibody, storage and transport functions.
Proteins provide structural support to cells, enabling them to repair and build.
Proteins as enzymes take part in cellular chemical reactions and assist in the formation of new molecules.
Messenger proteins help in transmission of signals that help keep various biological processes on track.
Proteins as antibodies help in the defence of the body against foreign antigens.
Proteins help in the transport of molecules throughout the body.