Final answer:
A single strand of RNA can form complex three-dimensional structures due to folding, although DNA is typically double-stranded. A, C, G, and T are not the bases in RNA; RNA contains uracil (U) instead of thymine (T). The work of Rosalind Franklin and R.G. Gosling was crucial in demonstrating the helical nature of DNA.
Step-by-step explanation:
The complexity of a single strand of unfolded RNA compared to a DNA double helix depends on what is meant by complexity. While DNA is typically double-stranded, RNA is typically single-stranded. However, this does not make RNA necessarily less complex. RNA can fold upon itself, forming intricate three-dimensional structures stabilized by short regions of complementary base pairing. This folding nature can sometimes make the structure of RNA more complex in some regards than the double helix structure of DNA.
Regarding the nucleotide bases, False, A, C, G, and T do not represent the bases in RNA. Instead, RNA contains uracil (U) instead of thymine (T). As for RNA's structure, False, the two polynucleotide chains of DNA twist into a double helix shape, not RNA.
The work of Rosalind Franklin and R.G. Gosling was indeed important in demonstrating the helical nature of DNA, lending credence to the Double Helix model as propounded by Watson and Crick.