Within the Nucleus
The following video introduces DNA:
Video 1. Click this link to view Overview of DNA on YouTube (opens in a new window).
Figure 2. DNA is shaped like a double helix, which resembles a twisted ladder. There are two strands of DNA with the complimentary nucleotides from each pointing inward from each strand. The sugar-phosphate backbone is shown in blue while the nucleotides are shown as follows: guanine "G" is shown in green that pairs with cytosine "C" shown in orange. Adenine "A" is shown in yellow and pairs with thymine "T" shown in red.
