Q. In a DNA, percentage of thymine is 20%. What is the percentage of guanine?
A) 20%
B) 40%
C) 30%
D) 60%
Explanation
Total DNA (100)=A+T+C+G A=20 % (given) A=T (Base pairing rule) 100=20+20+C+G C+G=100-40=60 $\ \ \ \ \ \ \ \ \ \ \ \ \ \ \frac{C}{G} = 30(C = G)$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.