Molecular Basis of Inheritance Question 29
29. In a DNA percentage of thymine is $20 %$ then what will be the percentage of guanine?[2002]
(a) $20 %$
(c) $30 %$
(b) $40 %$
(d) $60 %$
Show Answer
Answer : c
Hints & Solution
(c) According to Chargaff’s rule, the ratio of purine bases to pyrimidine bases is equal. $A=T, C=G$. If $T$ is $20 %$ then $A$ is $20 %$ and $C$ and $G$ are $30 %, 30 %$.
