Question

How many guanine found in double stranded DNA that has 700 hydrogen bonds and 10% adenine

Answer 1

Adenines use two H-bonds and guanines use three H-bonds and there are total 700 H-bonds. Thus,

2x + 3y = 700

Also, 10℅ of total H-bonds are made of Adenine's. So,

2x = 10℅ of 700 = 70

Which means x = 35 & y = 210.
Where x = no. Of adenines and y = no. Of guanines.

no. Of guanines.= 210