1/19
Hydroxyl
R - OH

Carboxyl

Ketone

Aldehyde

Amine

Sulfhydryl
R - SH

Phosphate

Monomers
small organic molecules (ex. monosaccharides, fatty acids, amino acids, nucleotides) that serve as building blocks
Polymers
Larger organic molecules (ex. carbohydrates, lipids, proteins, nucleic acids) that serve important biological functions.