Question

A mixture containing DNA fragments, A, B, C and D, with molecular weights of $A+B=C,A>B$ and $D>C$, was subjected to agarose gel electrophoresis. The positions of these fragments from cathode to anoe sides of the gel would be

• A. $D,C,A,B$
• B. $A,B,C,D$
• C. $C,B,A,D$
• D. $B,A,D,C$

Answer 1

The correct option is A $D,C,A,B$

Gel electrophoresis is the techniques by which negatively charged DNA fragments separate according to their molecular mass and the principle says that lighter goes the maximum distance that means heavy DNA stops first as D is heavier it separates first while B at last.

So the correct option is 'D,C,A,B'.