When you ponder over introns (junk DNA), one can see a comparison with programs that have been written by various programmers and have large sections commented out, or classes and routines that linger along and no-one uses anymore, although it did pass my mind a couple of times that these sections are just 'comments'.

Looking at DNA from a different angle it is data+code.

The nearest comparison in my mind is a zillion individual erhlang programs working concurrently with the output, not always very predictable.

Another similarity to programming is bugs!