Question: what is the difference between a dna and b dna?
Answer: Same as A-DNA, the backbone of B-DNA is formed by sugar phosphates that are linked continuous using phosphodiester bonds and the core region consists of nitrogenous bases. The two strands are held together by hydrogen bonds between nitrogenous bases. The helix width of B-DNA is 2nm. B-DNA is narrower than A-DNA.