Question

Rosalind Franklin contributed to the understanding of DNA by ______
(A) Producing images of DNA molecules using X-rays.
(B) Figuring out that DNA strands form a double helix.
(C) Conducting experiments that showed which nucleotides are complementary.
(D) Finding that DNA was nucleic acid made up of a long chain of individual nucleotides.

Answer 1

Pretty sure it is B.