| A | B |
|---|
| nucleotide | a subunit of DNA made up of a sugar, a phosphate, and a nitrogen base |
| phosphate | in DNA connects the sugars to each other |
| sugar | in DNA connects the base to the phosphate |
| base | one of four different pieces that make up the rungs of the DNA ladder |
| adenine | a base that connects with thymine |
| thymine | a base that connects with adenine |
| cytosine | a base that connects with guanine |
| guanine | a base that connects with cytosine |
