Question

Contribution of Franklin to the discovery of DNA structure?

Answer 1

Rosalind Franklin obtained superior X-ray diffraction photographs of DNA. His photographs concluded:

1. DNA polynucleotide chain has the form of regular helix.
2. The helix has a diameter of about 20 Å.
3. The helix makes one complete turn every 34 Å along its length.
4. The internucleotide distance is 3.4 Å.