Part I; Structure of DNA
Describe the following terms as they relate to the structure of DNA
i) Double Helix
The double helix of DNA is the description of the secondary structure of a DNA molecule. It consists of two strands that wind around each other. Each strand has a backbone made of deoxyribose and phosphate groups. Each deoxyribose is attached to one of four bases: adenine, cytosine, guanine, or thymine. The two strands are held together by hydrogen and sticking bonds between the bases. These interactions stabilize the DNA double helix.