Which statement best describes gel electrophoresis compared to capillary electrophoresis?

Which statement best describes gel electrophoresis compared to capillary electrophoresis?

• A. Gel electrophoresis is lower resolution and manual.
• B. Gel electrophoresis offers automated fragment-size determination.
• C. Gel electrophoresis is fully automated.
• D. Gel electrophoresis provides precise fragment-size data without interpretation.

Answer: (A)

Gel electrophoresis uses a solid gel matrix to separate DNA by size, but the bands often blur and broadening limits how closely different fragment sizes can be resolved. Because the process relies on manual handling—preparing the gel, running it, staining, washing, and visually interpreting bands—the workflow is labor-intensive and less amenable to automation. In forensic work, capillary electrophoresis provides much higher resolution, allowing precise sizing of DNA fragments, and it is paired with automated detection and software that generate interpretable data without manual lane-by-lane interpretation. So the statement that gel electrophoresis is lower resolution and manual best captures the practical difference. The other options misstate the level of automation and the precision of sizing that gel methods typically offer.

Gel electrophoresis uses a solid gel matrix to separate DNA by size, but the bands often blur and broadening limits how closely different fragment sizes can be resolved. Because the process relies on manual handling—preparing the gel, running it, staining, washing, and visually interpreting bands—the workflow is labor-intensive and less amenable to automation. In forensic work, capillary electrophoresis provides much higher resolution, allowing precise sizing of DNA fragments, and it is paired with automated detection and software that generate interpretable data without manual lane-by-lane interpretation. So the statement that gel electrophoresis is lower resolution and manual best captures the practical difference. The other options misstate the level of automation and the precision of sizing that gel methods typically offer.