RNA World

RNA is the first genetic material . There is now enough evidence to suggest that essential life processes ( such as metabolism , translation , splicing , etc.) , evolved around RNA. RNA used to act as a genetic material as well as catalyst . RNA being a catalyst was reactive and hence unstable . DNA has evolved from RNA with a chemical modification that makes it more stable. DNA being double stranded and having complementary strand further resists change by evolving a process of repair.

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