Rock+climbing+DNA

Green room. Gen-X rock climber scales the DNA helix while joking and describing the structural components. Perhaps he wipes electrically positive 'chalk' on his hands to get a better grip on the negatively charged backbone phosphates of the DNA. The charged nature of DNA is the fundamental basis of all DNA separations including electrophoresis, anion exchange chromatography, and organic extractions with phenol and chloroform. He can rest on the flat stacked bases. Maybe there would be a melted region where the bases are exposed. Could see an H-bond above. Melting and annealing DNA bases is a crucial concept for molecular genetics and for molecular biology.