In the first chapter of the book Genome, the author, Ridley, begins speaking about RNA and its history and how it is more "important" and "valuable" than DNA. RNA, Ridley states, came before DNA. DNA is basically information, like a "message written in a code of chemicals", one chemical for each letter to be exact. DNA is much more simpler than English since it only consists of letters like A,C,G, and T. Chromosomes contain the secret to life, Ridley states, but the question is HOW. RNA is a chemical substance that links DNA and proteins together. DNA is made from ingredients of RNA, indirectly. DNA's T's are made form RNA's Us. Enzymes rely on RNA to work. RNA can copy itself without the aid of anything else because it is dependent. LUCA, the Last Universal Common Ancestor, was believed to be a bacterium that lived in a warm pond. Now Luca is placed deep underground. Bacteria can acquire genes from other bacteria by consuming it. Life's history is written in the genome.
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