Question

in case of ds-DNA 15% of adenine is present. calculate how many hydrogen bonds are present if this dna contains 1200 nitrogen bases?

Answer 1

There are 180 Adenine, 180 Thymine (15% of 1200) and 420 Guanine, 420 Cytosine (35% of 1200).
180 Adenine form 360 hydrogen bonds with 180 Thymine and 420 Guanine form 1260 hydrogen bonds with 420 Cytosine.
(180x2=360, 420x3=1260)
Total hydrogen bonds is 1620 (360+1260).