The description of the secondary structure of DNA double helix are correct, EXCEPT
A、Two antiparallel strands
B、Deoxyribose-phosphate frame located outside the strands
C、Two strands are joined by hydrogen bond formed between A-T and G-C
D、Diameter of helix is 2 nm, and 10 bases in each turn
E、Nucleosome is the structure unit of DNA double helix