1
Question
If a DNA sample contain 23.8% cytosine resedues, then amount of thymine present in the same DNA sample is
If a DNA sample contain 23.8% cytosine resedues, then amount of thymine present in the same DNA sample is
Open in App
Solution
The correct option is C 26.2%
According to the Chargaff's rule of base pairing,
1. In a given DNA, the purines and pyrimidines are always in equal amounts i.e. A+G= T+C
2. The amount adenine is always equal to thymine and amount of cytosine as always equal to guanine i.e A=T and C=T
Thus, if C=23.8%, G=23.8%
A+T+C+G=100
Therefore, A+T=(100−2×C)%and A+T=(100−2×23.8)%=(100−47.6)%=52.4%
as, A=T, A=26.2% and T=26.2%
26.2%
According to the Chargaff's rule of base pairing,
1. In a given DNA, the purines and pyrimidines are always in equal amounts i.e. A+G= T+C
2. The amount adenine is always equal to thymine and amount of cytosine as always equal to guanine i.e A=T and C=T
Thus, if C=23.8%, G=23.8%
A+T+C+G=100
Therefore, A+T=(100−2×C)%and A+T=(100−2×23.8)%=(100−47.6)%=52.4%
as, A=T, A=26.2% and T=26.2%
Suggest Corrections
0
Similar questions
View More
Join BYJU'S Learning Program
Explore more
Join BYJU'S Learning Program
