Messenger RNA (mRNA) carries DNA's genetic information to the ribosome, where it is translated into a sequence of amino acids. mRNA is fed into the ribosome, and it is positioned so that it can be read in groups of three letters, known as codons. Each mRNA codon is matched against the transfer RNA molecule's anti-codon. If there is a match, the amino acid carried by the transfer RNA is added to the growing protein chain.
Simply put, the cell has DNA-RNA-Protein. Each very complex but work together. Which came first? What are the odds of ending up together in one cell? The body is believed to contain about 100 trillion cells. Chance? or Design? Detailed info on how the amazing design can be found at http://www.ncbi.nlm.nih.gov/pubmed/17668892