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Polymerases - Break the DNA into fragments

Nucleases - Separate the two strands of DNA

Exonucleases - Make cuts at specific positions within DNA

Ligases - Join the two DNA molecules

answer is D.

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Detailed Solution

Ligases join two DNA molecules. Polymerases catalyses synthesis of DNA/RNA. Nucleases digest nucleic acid and Exonuclease removes nucleotides from end of DNA.

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