The Two DNA Chains in a Double Helix ______

Multiple Choice

The two DNA chains in a double helix ______ .

A) have an overall diameter of 2 µm
B) have identical base sequences
C) are held together due to the charges of their phosphate groups
D) wind around each other in such a way that purines are always opposite pyrimidines and vice versa
E) are parallel to each other in 5' to 3' directionality