Question

what are the different forms of DNA

Answer 1

there r no forms of dna
only rna have three forms
i.e.
mRna messenger rna
tRna transfer rna
rRna ribosomal rna

Answer 2

form nucleic acids and Z‑DNA. Three different forms of duplex nucleic acid have been described. The most common form, present in most DNA at neutral pH and physiological salt concentrations, is B-form. That is the classic, right-handed double helical structure