>>14240296Fatty acid vesicles form easily and readily.
RNA molecules are chemically produced in reducing atmosphere conditions easily.
Fatty acid vesicles that happen to form around RNA nucleotides have greater osmotic pressure inside and tend to "steal" fatty acid molecules from vesicles that have less osmotic pressure, leading to a natural advantage for vesicles with more RNA.
Vesicles grow and form branched structures through entirely physical processes, then break up once they reach a certain size into many smaller vesicles with randomly distributed contents.
RNA monomers can move through vesicle walls but polymer chains are too big.
RNA can spontaneously form strands when heated and cooled cyclically, such as when a vesicle convects around next to a hydrothermal vent.
RNA is single stranded but when heated and cooled cyclically it can form a mirror image strand which separates off again, leading to imperfect abiotic replication of random sequences of RNA.
Maintain these conditions next to a million hydrothermal vents across the entire planet for 250 million years and eventually one of those fatty acid vesicles will end up containing an RNA strand which can fold and attach to itself to form a weak enzyme which encourages RNA molecule growth (RNA in our own cells acts both as an enzyme in some cases and as an information storage molecule similar to DNA).
This is the first gene. Vesicles with this sequence of RNA will "grow" faster and have better "reproductive" success. From this starting point you evolve more complex and stable RNA genomes, more and better RNA enzymes, ability to produce fatty acids, ability to produce RNA monomers, active rather than passive metabolisms and reproduction, etc.
It's that simple in abiogenesisery.
