| A | B |
|---|
| DNA does what? | Stores and transmits genetic information |
| What is DNA made up of? | repeating nucleotides |
| What 3 things are nucleotides made up of? | sugar, phosphate groups, and nitrogen-containing bases (there are 4) |
| What are purines | two rings of carbon and nitrogen |
| what are Pyrimidines | one ring of carbon and nitrogen |
| Who discovered the double helix? | Watson, crick, franklin |
| What is a double helix? | two chains of nucleotides that wrap around eachother in a double spiral |
| the doube helix is the backbone of | sugar and phosphate models |
| nitrogen containing bases face the | center of the helix |
| bases join by what bond | hydrogen bond |
| hydrogen bonds are weaker or stronger than other bonds? | weaker than both ionic and covalent bonds |
| each full right-handed turn has how many base pairs? | 10 base pairs |
| cytosine pairs with what? | guanine |
| guanine pairs with what? | cytosine |
| adenine pairs with what? | thymine |
| thymine pairs with what? | adenine |
| during DNA replication, then enzyme DNA polymerase | constructs new nucleotide chains that are complementary to the chains in the original DNA molecule |
