One theory holds that the first self-replicating molecules were:

Question

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The RNA World hypothesis suggests that self-replicating RNA molecules were the precursors to all life on Earth. RNA has the ability to both store genetic information and catalyze chemical reactions, making it a likely candidate for the first self-replicating molecule. Lipids, amino acids, carbohydrates, and DNA do not have the same combination of properties that would make them ideal for this role.

One Theory Holds That the First Self-Replicating Molecules Were