Largest molecule in the cell
James Watson and Francis Crick
Not Applicable (Cambridge)

DNA was discovered in 1953 by James Watson and Francis Crick at Cambridge, UK. This double helix-shaped molecule contains all the genetic code required to build an individual. Each of the ten trillion cells in the human body contains this code. If each DNA molecule could be unwound and stretched out, they would each be around 2 m (6 ft) long. If the combined DNA from all cells in the body could be stretched out and laid end-to-end, it would reach the Sun and back more than 600 times.