Question

How many forms of DNA does Rosalind initially photograph?

Answer 1

Rosalind Franklin initially photographed two forms of DNA: type 'A' and type 'B'. Her X-ray diffraction images provided crucial information about the structure of DNA.

Step-by-step explanation:

Rosalind Franklin initially photographed two forms of DNA: a long, thin fiber formed when wet (type 'B') and a short, wide fiber formed when dried (type 'A'). Her X-ray diffraction images of DNA provided crucial information that allowed Watson and Crick to confirm that DNA forms a double helix and determine its size and structure.