Ascientist uses material in her lab to separate dna fragments by size what process is she using

A scientist uses materials in her lab to cut a DNA sample into fragments.  via process called transformation

The material used in the lab to separate DNA fragments is agarose gel electrophoresis.

Explanation:

The cutting of DNA by restriction endonuclease results is fragments of DNA. These fragments can can be separated by a technique called gel electrophoresis. Since DNA molecules are negatively charged they can be separated by a forcing them to move towards the positive electrode anode under an electric field through a medium or matrix. The most commonly used matrix is agarose which is a natural polymer extracted from sea weeds. The DNA fragment separate according to their size through the sieving action of agarose gel. Smaller fragments moves fast compared to the larger fragments. Once the DNA fragments are separated they are observed under the UV light by staining them with ethidium bromide.