| A | B |
| organic molecules | has both "c" and "h" |
| dehydration synthesis | join two molecules by removing a molecule of water |
| hydrolysis | split a molecule into two molecules by adding a molecule of water |
| inorganic molecules | lack either "c" or "h" |
| atoms | represented by chemical symbols (on periodic table) |
| molecules | two or more atoms bonded together |
| chemical formula | shows (1)which atoms & (2)what number of atoms |
| DNA & RNA | the two types of nucleic acids |
| sugar, phosphate, nitrogen bases | the 3 parts of a nucleotide |
| amino acids | the building blocks of proteins |
| double helix | the scientific term the "twisted ladder" shape of DNA |
| proteins | consist of amino acid strands |
| peptide bond | hold amino acids of a protein together |