Which of the following were determined specifically by Franklin & Wilkins in their x-ray diffraction studies? Choose all that apply, and remember that just because a statement is accurate does not necessarily make it a correct response to the question posed.

1. The ratio of A to T in a given organism's DNA is 1.
2. DNA has a uniform width down the length of the molecule.
3. DNA is an antiparallel molecule.
4. The sugars and phosphates in a DNA molecule are on the outside.
5. GC base pairs have 3 H-bonds; AT base pairs have 2 H-bonds.