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The apparatus typically used for running DNA gels is the horizontal gel electrophoresis box. This setup is designed specifically for agarose gel electrophoresis, which is commonly utilized for DNA separation and analysis.

In horizontal gel electrophoresis, the gel is poured into a tray that is oriented horizontally, allowing the samples loaded into the gel wells to migrate through the gel matrix in a horizontal direction when an electric current is applied. This method is particularly effective for resolving DNA fragments based on their size, as smaller fragments move more quickly through the gel than larger ones.

This type of apparatus is preferred for DNA analysis due to its ease of use, allowing for straightforward loading of samples and visualization of results, often through staining techniques that allow bands of nucleic acids to be seen.

Other options, such as the vertical gel electrophoresis box, while also used in electrophoresis techniques, are primarily suited for certain types of proteins or polyacrylamide gels rather than standard DNA applications. The polymerase chain reaction chamber is not designed for gel electrophoresis, as it is specifically used for amplifying DNA. A centrifuge is unrelated to the process of running gels altogether, as it is intended for separating components of mixtures based on density rather than