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Which of the following enzymes acts on the DNA after its entry into the cell?

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Which of the following enzymes acts on the DNA after its entry into the cell?

(a) Ligases

(b) Endonucleases

(c) Deoxy ribonucleases

(d) Exonucleases

I had been asked this question in final exam.

My question comes from Genetic Recombination topic in division Genetic Recombination of Drug Biotechnology

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The correct choice is (c) Deoxy ribonucleases

To elaborate: After DNA entry into a cell, one strand is immediately degraded by deoxy ribonucleases, while the other strand undergoes base pairing with a homologous portion of the recipient cell chromosome.

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