1. To understand the major conformational features of A-, B-, and Z-DNA.
2. To understand how to recognize conformational differences using various representations of DNA structure.

Compare the three-dimensional structures of DNA. Click on any of the three representation buttons associated with a form of DNA (Ribbon, Spacefill, or Wireframe) to see the corresponding representation in 3-D.

1. Which form of DNA has the greatest diameter helix?
2. Which form of DNA has the greatest helical pitch?
3. What are the major ways in which the structures of B-DNA and A-DNA differ from one another?
4. What are the major ways in which the structures of B-DNA and Z-DNA differ from one another?