Watson and Crick (with Franklin's help) were the first to suggest that DNA is a_____.
a
very short molecule
b
source of genetic material
c
protein
d
double helix
d
double helix
Watson and Crick, with substantial and critical contributions from Rosalind Franklin and Maurice Wilkins, were the first to suggest the structure of DNA is a double helix. Their work was published in 1953. Rosalind Franklin's X-ray diffraction images of DNA were particularly crucial in deducing the helical structure of the DNA molecule.