The charge present on the DNA backbone is negative. The force required to accelerate the molecules towards anode is directly proportional to the number of ____________
A)sugar molecules
B)nitrogenous bases
C)phosphate groups
D)both phosphate group and sugar molecules

Question

Quizplus · Accepted Answer

The negative charge on the DNA backbone is due to the phosphate groups. The more phosphate groups there are, the stronger the negative charge, and thus the force required to accelerate the molecules towards the anode (positively charged electrode) in electrophoresis is directly proportional to the number of phosphate groups.

The Charge Present on the DNA Backbone Is Negative