Molecular Basis Of Inheritance Ques 138
138. 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 $30 \%, 30 \%$.
BETA
