| Term | Definition |
| monomer | The smaller sub-unit that makes up a larger,longer molecule |
| polymer | Large molecule formed when many smaller molecules bond together |
| RNA | A nucleic acid that forms from a copy of DNA for use in making proteins |
| amino acids | Basic building blocks of proteins |
| DNA | A nucleic acid that contains our genetic information |
| gene | Segment of DNA that controls the protein production and the cell cycle |
| DNA replication | Process in which chromosomal DNA is copied before mitosis or meiosis |
| codon | Set of three nitrogen bases that represent an amino acid |
| transcription | Process in the cell nucleus where enzymes make an RNA copy of the DNA strand |
| translation | Process of moving information in mRNA into a sequence of amino acids in a protein |
| mutation | Any change or random error in a DNA sequence |
| double helix | shape of DNA molecule formed when two twisted DNA strands are coiled together |
| nitrogenous base | carbon ring structure found in DNA or RNA that contains one or more atoms of nitrogen; forms the rungs on the DNA strand |