Test render of the dna strand model with a dgs_material shader. The render is very blown out, but it's just a test render. Next step: refining the model and reducing the faceted/chucky look to the strands.
I found a really great way to easily model a dna strand with NURBS, by using nurbs circles and surfaces. Here are just a few screen caps of my process.
As suggested by my father, the cilia in the previous cilia/mucus river needed to be much thicker. Here is a new still image render of the cilia in the mucus river. Much better!