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
Explanation: The DNA backbone is negatively charged because of the phosphate groups. Hence, the force required to move the molecules towards the anode is directly proportional to the number of phosphate groups present.