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(D) The process of separating $DNA$ fragments based on their size is known as gel electrophoresis. After the $DNA$ fragments are separated on an agaro

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Ethidium bromide

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(D) The process of separating $DNA$ fragments based on their size is known as gel electrophoresis. After the $DNA$ fragments are separated on an agarose gel,they cannot be seen directly under visible light. To visualize the $DNA$ fragments,the gel is stained with a fluorescent dye called Ethidium bromide $(EtBr)$. When the stained gel is exposed to $UV$ radiation,the $DNA$ fragments appear as bright orange-colored bands.

Separated $DNA$ fragments on an agarose gel can be visualized after staining with ....

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