Which of the following statements describing the Watson-Crick model for DNA structure is INCORRECT?
A. DNA has two grooves running helically along its length, one of which is wider than the other.
B. The base-paired polynucleotide chains have antiparallel directions.
C. The classic Watson-Crick hydrogen bonding between AT and GC pairs is found in Z-DNA.
D. One turn of the double helix involves approximately 10 nucleotides.
E. The helical structure is stabilized entirely by hydrogen bonding.
