Question

Explain how the discoveries by Rosalind Franklin helped Watson and Crick build an accurate model of DNA.

Answer 1

n 1952, Rosalind Franklin produced an image of DNA that suggested it contained two strands twisted in a double helix with a phosphate backbone and bases inside. ... Watson and Crick used this information to build and accurate model of DNA

Answer 2

Rosalind's x-ray showed that the ladders of nucleotides were inside a double helix.

Watson and Crick built models with the ladders on the outside.