Answer:
During electrophoresis, DNA fragments move toward the anode, which indicates that it has a negative charge.
Step-by-step explanation:
The electrophoresis or gel electrophoresis of DNA, is a procedure that allows the separation of DNA fragments, according to their size. The presence of phosphate groups -present in the strands- gives the DNA the negative charge that induces it to move towards the anode during electrophoresis.
Each DNA fragment has a specific size and charge, and electrophoresis the fragments of equal size or charge are grouped in the same place in the gel.
The other options do not apply because:
A. It is very small and C. It has a positive charge. D. It has a high molecular weight. The size of the DNA fragment does not influence its electrophoretic behavior.
B. It has a positive charge. DNA is negatively charged, due to the presence of phosphate groups in the molecule.