Question

During electrophoresis, DNA fragments move toward the anode. What does this

Answer 1

Answer:

During electrophoresis, DNA fragments move toward the anode, which indicates that it has a negative charge.

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.