The SETI program was set up to search for coded radio signals in space. The signal they are looking for has to be repetitive or in a sequence. It can not be random. When they find this signal they will deem it came from an Inteligent source. So using the same reasoning, if we find a coded source, it means someone inteligent made it. DNA is coded information. Someone made that information and put it there. Information can not come from nothing.
Also just a thought.
~A cell needs information to be made.
~Information has to be stored somewhere. (In a cell)
Using the evolutionary model, how can this start.