In that length, DNA spirals just about one full turn.

This, however, is NOT an interactive 3D model.

It’s just a conventional static illustration.

The NEXT scene in this presentation provides the corresponding interactive 3D model.

This scene is only a pause in which to remind you that loading this complex 3D model into the NEXT scene takes a while (a good fraction of a minute the first time you view this model, 10-20 seconds on subsequent views). Further, some mobile devices may not be able to load this model at all.

So, once you click the "Next Scene" button below:

PLEASE BE VERY PATIENT