[vadimberman]

It depends on the kind of panspermia.

If it's about generic organic molecules then the DNA is a local construct. If it's about microorganisms, then it's different.

[seiferteric]

True. It's also possible that DNA is the only form of life that really works, but we just don't know yet.

[lovemenot]

There's 6-base pair organisms now. https://www.sciencealert.com/new-organisms-have-been-formed-...

Also, RNA seems to work and it's possible we started out using RNA and later evolved to DNA.