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A more primitive form of DNA (Dioxyribonucleic acid) is the RNA (Ribonucleic acid). RNA can self assemble
into ribozymes which can carry out chemical reactions including self replication.
RNA as a predecessor to DNA.
Image source: http://commons.wikimedia.org/wiki/File:Difference_DNA_RNA-EN.svg
ICY SCIENCE | QTR 1 2014