biomolecule 
noun
A molecule that is involved in the maintenance and metabolic processes of living organisms.I typed it out as I was thinking about how some major classes of biomolecules - protein, carbohydrate, lipid, and nucleic acid - are perceived....
- In its extreme forms, this approach takes organic synthesis as the means rather than a prerequisite, and views complex biomolecules like DNA and proteins as symptoms of life rather than its cause.
- A knowledge of the proteins and other biomolecules that genes control is the other half.