What role does gel electrophoresis play in identifying a specific gene? O It binds the gene of interest with probes It separates DNA fragments It kills all the cells that have not taken up the gene of interes It cuts out the gene of interest in DNA at specific points.​

separates fragments of DNA that have different lengths.

Explanation:

The particles that are contains in the gel interrupt the path of the DNA fragments when they are attracted by the electric current, so the longest ones are the ones nearest the origin(where the sample was placed before the electrophoresis) and the smallest ones are the ones at the end of the gel.

waste is toxic to the cells and must be removed quickly. ... If they build up they will inhibit the reactions that produced them interfering with normal metabolic processes.