Error catastrophe in the replication is resolved by innate proofreading during the polymerization process

An important issue for the origins of life is how to ensure the accurate maintenance of information in replicating polymers in the face of inevitable errors. We investigate how this maintenance depends on reaction kinetics by incorporating elementary steps of polymerization into the population dynamics of polymers. We find that template-directed polymerization entails an inherent error-correction mechanism akin to kinetic proofreading, making a longer polymer more tolerant to an error catastrophe. Since this mechanism requires no enzyme, it is likely to operate under wide prebiotic conditions.