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The RNA World hypothesis proposes that early life on Earth was based primarily on ribonucleic acid (RNA), which functioned both as genetic material and as a catalyst for chemical reactions. According to this hypothesis, RNA existed before the evolution of DNA and proteins and played a central role in the origin and early evolution of life. RNA ___ ___ _________ ________ __________ _____ ____ ______ _______ ________ ______.
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