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Choose the correct pair from the following

1. Polymerases – Break the DNA into fragments
2. Nucleases – Separate the two strands of DNA
3. Exonucleases – Make cuts at specific positions within DNA
4. Ligases – Join the two DNA molecules

Correct answer: Ligases – Join the two DNA molecules

Solution

Ligases catalyze the formation of phosphodiester bonds, so they join DNA fragments or molecules together. The other options describe incorrect functions for those enzymes.

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