The common theory is of the RNA world. In theory, if the entire organism is just a long RNA strand, there is no need for proteins or lipid bilayers. How such an organism emerged in the first place is already quite hard to know.
Actually lipid bilayers are extremely complicated as they have to filter what gets into the cell and what doesn't, as well as what might leave it. Earlier systems might have done without them and instead attached everything onto long chain like structures... You know like a keychain. Both RNA and Proteins are long chains so maybe that's how they evolved.
Actually lipid bilayers are extremely complicated as they have to filter what gets into the cell and what doesn't, as well as what might leave it. Earlier systems might have done without them and instead attached everything onto long chain like structures... You know like a keychain. Both RNA and Proteins are long chains so maybe that's how they evolved.