These bio-molecules serve many functions throughout the body including signaling molecules, receiving signals, transporting other molecules or ions across the cell membrane, catalyzing reactions, regulating gene expression, and defending the body against pathogens

a. k. a "the workers of the cell"

Answer: Proteins

Explanation: Proteins are large, complex macramolecules made of monomers amino acid, the play many critical roles in the body.

All enzymes are protein, peripheral proteins and integral proteins receive signals and transport other molecules and ions across the cell membrane.

The word protein is derived from Greek word, ''proteios'' which means primary. Proteins are of paramount importance for biological system. Out of the total dry body weight 3/4 are made up of proteins. Proteins are use for body building, all the major structural and functional aspects of the body are carried out by protein molecules. Abnormality in protein structure will lead to molecular diseases with profound alteration in metabolic functions.