| A | B |
|---|
| Term that describes the structure of DNA | double helix |
| Phosphate and sugar make up this part of DNA | backbone |
| This nitrogen base pairs with adenine | thymine |
| This nitrogen base pairs with guanine | cytosine |
| A term which describes the type of pairing of DNA bases | complementary base pairing |
| The part of the DNA backbone to which nitrogen base is attached | sugar |
| The number of bases of DNA that are read at a time | three |
| Name for the basic unit of DNA | nucleotide |
| The basic unit of protein | amino acid |
| Name for the code of three bases | triplet code |
| The strand of DNA that is read to produce protein | sense strand |
| The strand that does not hold the code for protein | antisense strand |
| This happens to DNA before it can be read | unwinds |
| Term that describes a change in DNA | mutation |
| Type of mutation which causes no noticeable change | silent mutation |
| A change in DNA where one or more bases are added to it | insertion |
| A change in DNA where one or more bases are missing | deletion |
| A change in DNA where a base is changed for another | substitution |
