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Why is RNA, and not DNA believed to be the basic origin of the living cell?

Why is RNA, and not DNA believed to be the basic origin of the living cell?

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Last updated by Arthur S #1175301
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It now seems certain that RNA was the first molecule of heredity, so it evolved all the essential methods for storing and expressing genetic information before DNA came onto the scene. However, single-stranded RNA is rather unstableand is easily damaged by enzymes

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