AIIMS 2012 Biology Question Paper for free online practice with solutions

The positions of these DNA fragments on the electrophoresis gel depends upon relative molecular weight.
The fragment with lowest molecular weight will appear farther from the wall and fragment with higher molecular weight will appear near the wall. So on the basis of information given, Molecular weight of d is maximum and molecular weight of b is minimum. So, the order of fragment will be
(b,a,c,d)