The Double Helix

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1. 01

   The molecule carrying life's instructions has the shape of a twisted ladder, with two strands joined by rungs that always pair the same way.

   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.

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