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Gel Electrophoresis Restriction Enzymes

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Several DNA samples were digested with different restriction enzymes (endonucleases) and separated by gel electrophoresis, as shown.

Diagram of a vertical gel electrophoresis result with three labeled lanes at the top: EcoRI, HaeIII, and HindIII. Each lane contains horizontal black bands representing DNA fragments. The EcoRI lane h

The terms "EcoRI," "HaeIII," and "HindIII" refer to which of the following?

A

The organisms from which the original DNA samples were obtained

B

The restriction enzymes used to digest the DNA

C

The buffers used to maintain a constant pH during sample processing

D

The types of proteins encoded by each DNA fragment

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