What are all of lifes molecules sythesized by?

Answer 1

I'm not sure I understand your question. Molecules are made up of atoms, elements are composed of the same type of atoms. Every type of naturally occurring atom (except hydrogen & helium) is formed in the core of Suns (stars) and no where else. Since molecules are made of atoms and atoms are made in Suns you could say all molecules are synthesized in Suns.