Unzipped

It's finals week here at Cal Poly so I've got a short post.  This is one of my most frequently-viewed cartoons.  It's also one of my first (drawn in 1998).

There are some recognizable organelles and molecules in the background...a mitochondria, a ribosome associated with an mRNA.  As far as classroom uses go this cartoon could be used to reinforce that the hydrogen bonds that hold two single strands of DNA together are relatively weak and under normal cellular conditions will undergo temporary dissociation.