The form of DNA that is observed to adopt a left- handed helix is ______ .
A)P- DNA
B)Z- DNA
C)C- DNA
D)A- DNA
E)D- DNA

Question

Quizplus · Accepted Answer

The form of DNA that is observed to adopt a left-handed helix is Z-DNA. It occurs under certain conditions such as high salt concentration, alternating purine-pyrimidine sequences, or negative supercoiling. P-DNA and A-DNA are right-handed helical forms of DNA, while C-DNA and D-DNA are not known to exist.

The Form of DNA That Is Observed to Adopt a Left-