1. DNA Structure and Function
Page 4 of Unit 4 Folder

2. DNA DNA is a double helix
Has two outer backbones made of sugar and phosphate and four repeating base pairs
The base pairs are:
Adenine
Cytosine
Guanine
Thymine

3. DNA The base pairs only every bind with one other specific base pair.
Adenine always pairs with thymine (A with T)
Cytosine always pairs with guanine (C with G).

4. DNA Replication The sugar phosphate backbones come apart
The base pairs split from their partner
Each sugar phosphate backbone generates new matching base pairs
Two identical DNA molecules result.

5. Answer Key