Choose the correct description of capillary electrophoresis.

i. Capillary electrophoresis uses thin glass tubes containing polyacrylamide gel to which amplified DNA is loaded onto the top of the tube.

ii. Capillary electrophoresis uses slab agarose gel to which amplified DNA is loaded onto wells.

iii. Capillary electrophoresis uses thin glass tubes containing agarose gel to which amplified DNA is loaded onto the top of the tube.

iv. Capillary electrophoresis uses slab polyacrylamide gel to which amplified DNA is loaded onto wells.

Capillary electrophoresis is a technique used to separate DNA fragments based on size and charge using thin glass tubes filled with a gel. It allows for the separation and detection of DNA fragments based on their migration through the gel.

Explanation:

Capillary electrophoresis is a technique used to separate DNA fragments based on their size and charge. It uses thin glass tubes (capillaries) that are filled with a gel, usually made of polyacrylamide, which acts as the separation medium. Amplified DNA samples are loaded onto one end of the capillary and an electric current is applied, causing the DNA fragments to migrate through the gel. As the fragments move, smaller fragments migrate faster and travel farther than larger fragments, allowing them to be separated and detected.

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