| A | B |
| base | a type of chemical; order matters |
| sequence | a list of things in a particular order |
| rungs | steps on a ladder |
| proteins | what lots of parts of a cell are made of |
| cells | fluid filled bags that make up living things |
| membranes | have tiny holes like a cloth that lets chemical through |
| code | instructions for how to make |
| blueprint | instructions for how to make |
| gene | a base sequence that codes for a protein |
| allele | version of a gene with a tiny difference in base sequence |
| mutation | when a base in a sequence gets changed |
| nucleus | tiny bag inside cells that holds DNA |
| DNA | a molecule (chemical) made of bases (A, C, T, G) |
| A | symbol for adenine (a base) |
| G | symbol for guanine (a base) |
| C | symbol for cytosine (a base) |
| T | symbol for thymine (a base) |
| phosphate | symbol P (found in DNA backbone) |
| sugars | found in DNA backbone |
| DNA backbone | anther name for sides of DNA ladder |
| nucleotide | phosphate, sugar and base |