In sea urchin DNA, which is double stranded, 17% of the bases were shown to be cytosine. The percentages of…

102 2015 AIPMT-I Molecular Basis of InheritanceChargaff's rule Easy
In sea urchin DNA, which is double stranded, 17% of the bases were shown to be cytosine. The percentages of the other three bases expected to be present in the DNA are
A G 34%, A 24.5%, T 24.5%
B G 17%, A 16.5%, T 32.5%
C G 17%, A 33%, T 33%
D G 8.5%, A 50%, T 24.5%

Detailed Solution

Chargaff's rule for double-stranded DNA: A = T and G = C.
C = 17%, so G = 17%.
A + T = 100 − 34 = 66%, and A = T, so A = 33% and T = 33%.

Molecular Basis of Inheritance in past papers

131 questions from this chapter have appeared across 17 exam years.

More questions from Molecular Basis of Inheritance

Keep going

Practise Molecular Basis of Inheritance All 131 questions This chapter in 2015 AIPMT-I