what is Z-DNA n pliz give some specific characteristic or information about Z-DNA..?

Answer 1

Z-DNA, is the complete opposite of the normal DNA that Watson and Crick elucidated in 1953. It is called Z-DNA because of its opposite structure to the DNA that is normall found within out cells.

Z-DNA differs from the normal B-DNA in a few ways. First, Z-DNA is a left handed helix which means the 5' to 3' end with the 5' end being wrapped in front first. Second it has a zig zag conformation rather than the helical structure of B-DNA. Also, the minor and major grooves are bigger in Z-DNA than B-DNA (normal structure). The rise per base pair is 3.8 angstrom while for B-DNA is 3.4. The helix axis location is normally through the base pairs for B-DNA but for Z-DNA is the minor groove.

Hope this helps and good luck!