DNA with high GC-content is more stable due to intra-strand base stacking interactions.As noted above, most DNA molecules are actually two polymer strands, bound together in a helical fashion by noncovalent bonds; this double stranded structure (dsDNA) is maintained largely by the intrastrand base stacking interactions, which are strongest for G,C stacks.. 
Bí DNA, nana na jẹ́ dídá pẹ̀lú ẹ̀wọ̀n gígùn tó únjẹ NuHédíìsì.. 