Genetic engineering is possible because:

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(D) Genetic engineering,or recombinant $DNA$ technology,relies on the ability to manipulate $DNA$ molecules precisely.Restriction endonucleases are en

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Restriction endonucleases purified from bacteria can be used in vitro

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(D) Genetic engineering,or recombinant $DNA$ technology,relies on the ability to manipulate $DNA$ molecules precisely.Restriction endonucleases are enzymes that act as 'molecular scissors' by cutting $DNA$ at specific recognition sequences.These enzymes were originally discovered in bacteria as a defense mechanism against bacteriophages.Once purified,these restriction endonucleases can be used in vitro (outside the living organism) to cut $DNA$ molecules at specific sites,which is a fundamental step in creating recombinant $DNA$ constructs.

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