Question

Adenine is `30%` then what would be the % of guanine in a dsDNA

Answer 1

Percentage of guanine is 20% in a ds DNA

Explanation:

• according to Chargaff rule, Amount of purine (A+G)=amount of pyrimidine(T+C)
• Amount of A = amount of T, Amount of G= Amount of C
• A=30% so, T=30% ; So, A+T= 60% ; so, G+C= 40%
• As amount of G = amount of C so G=20% and C= 20%
• so total purine content(A+G=30%+20%=50%)=total pyrimidine content(T+C=30%+20%=50%) in a ds DNA.