DNA and RNA symmetries per the origin(s) of life

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Main Question or Discussion Point

Does the single-handedness of DNA and RNA indicate that life originated few times, if more than once? What might the sameness between early sequences (in bacteria, say) indicate in this regard?
 

Answers and Replies

  • #3
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From the article
The origin of one-handedness in biological molecules is not yet clear2. Several explanations have been put forward to explain how homochirality came about, but all are speculative — it is not even known yet whether it arose by chance or by some other means
 

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