| A | B |
| organic compound | a carbon based substance that is the basis of living matter. |
| macromolecule | Large molecule formed by joining smaller organic molecules together. |
| polymer | large molecule formed from smaller repeating units of identical, or nearly identical compounds linked by covalent bonds |
| carbohydrate | organic compound containing carbon, hydrogen, and oxygen in a ratio of 1 oxygen:2hydrogen:1carbon |
| lipid | Hydrophobic biological molecule composed mostly of carbon and hydrogen; fats, oils and waxes are are examples. |
| protein | organic compound make of amino acids joined by peptide bonds; primary building blocks of organisms |
| amino acid | carbon compounds joined by peptide bonds; building block of proteins |
| nucleic acid | complex macromolecule that stores and communicates genetic information. |
| nucleotide | a subunit of nucleic acid formed from a simple sugar, a phosphate group and a nitrogenous base. |