Would you choose an exonuclease while producing a recombinant DNA molecule?

Explanation

**Step-by-Step Solution:**

1. **Understanding Exonuclease**: Exonucleases are enzymes that cleave nucleotides one at a time from the ends of a polynucleotide chain. They can act on either the 3' or 5' ends of DNA.

2. **Function of Exonuclease**: The primary function of exonucleases is to remove nucleotides from the ends of linear DNA molecules. They do not have the capability to cut DNA at internal sites or to create sticky ends necessary for recombinant DNA technology.

3. **Recombinant DNA Production**: When producing recombinant DNA (rDNA), it is essential to create specific ends on the DNA fragments to facilitate the joining of different DNA molecules. This is typically done using restriction enzymes (endonucleases) that can cut DNA at specific sequences.

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