Question

20 which scientists work first suggested that dna had the shape of a helix? multiple choice francis crick james watson rosalind franklin martha chase

Explanation:

Rosalind Franklin's X - ray diffraction work on DNA first suggested its helical shape. Watson and Crick later built on this to propose the double - helix structure. Martha Chase is known for the Hershey - Chase experiment (not related to DNA shape).

Answer:

Rosalind Franklin