| A | B |
| carbohydrate | also known as "saccharides" |
| lipid | commonly found as fats, oils, and waxes |
| protein | made of monomers of amino acids |
| nucleic acid | made of monomers of nucleotides |
| carbon | the essential element in all organic molecules |
| covalent bond | a bond formed by the sharing of electrons |
| ionic bond | a bond formed by the transfer of electrons |
| electron | a subatomic particle with a negative charge |
| hydrogen bond | the weakest of all bonds; occurs between two polar molecules |
| adenine | the "A" base of DNA |
| thymine | the "T" base of DNA |
| guanine | the "G" base of DNA |
| cytosine | the "C" base of DNA |
| uracil | The "U" base of RNA |
| DNA | a double stranded molecule that stores genetic material |
| RNA | a single stranded molecule that transfers genetic material |
| twenty | the number of amino acids |
| carboxyl | the portion of a protein that is -COOH |
| amine | the portion of a protein that is -NH3 |
| side chain (R-group) | the portion of a protein that varies |