Length = (length of 1 base pair) x (number of base pairs per cell)
= (0.34 nm)(6 x 109)
= 2.04 meters

Suppose DNA was spliced together in a repetitive manner so that its outside surface attracted only carbon, which then somehow bonded with each other to form a really long carbon nanotube sheath around the DNA molecule... then the whole thing was dessicated causing the DNA inside to fragment so it could be purged from the sheath with an inert gas.

I'm no chemist. Obviously. But I do know that DNA serves as a template for protein synthesis in the cell. And a "template" is just another type of erector set, or fixture, used for holding and assembling parts in a mass-production factory, and doing so in an identical manner, endlessly, one after another.