Genetic engineering is possible because

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

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Restriction endonucleases purified from bacteria can be used in the laboratory.

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(D) Genetic engineering,or recombinant $DNA$ technology,relies on the ability to manipulate $DNA$ molecules.Restriction endonucleases are enzymes that act as 'molecular scissors' by cutting $DNA$ at specific recognition sequences.These enzymes were originally discovered in bacteria,where they serve as a defense mechanism against bacteriophages.By purifying these enzymes from bacteria,scientists can use them in the laboratory to cut $DNA$ at precise locations,which is the fundamental step in creating recombinant $DNA$ molecules.

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