which tube carries which sample? 2. Let's say you have two bacterial samples in tubes 1 and 2, one of which has been transformed with ONLY a vector and the other with a RECOMBINANT construct. Using PCR and gel electrophoresis (use both), how will you determine which tube carries which sample? Describe where the primers will anneal (not specific sequence but general location), what you expect to observe on the gel and how you will analyze and draw conclusions from the results? A schematic may be helpful!