Author
James D. Watson
1 reading card from 1 book · 1968.
1 card
The Double Helix · 1968
DNA is a twisted ladder with complementary steps, ensuring exact copying of genetic information.
Watson tells the story of the race between research teams to discover DNA's shape. The key clue was an X-ray photograph showing a twisted form. The ladder's two strands always pair up the same way, like a zipper, letting information be copied exactly into every new cell.