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(D) When $DNA$ molecules are cut by the same restriction endonuclease,they produce complementary single-stranded protrusions known as 'sticky ends'.Th

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$DNA$ ligase

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(D) When $DNA$ molecules are cut by the same restriction endonuclease,they produce complementary single-stranded protrusions known as 'sticky ends'.These sticky ends form hydrogen bonds with their complementary counterparts on another $DNA$ fragment.$DNA$ ligase is the enzyme responsible for sealing the nicks in the sugar-phosphate backbone by forming phosphodiester bonds between the adjacent nucleotides.Therefore,the stickiness of the ends facilitates the action of $DNA$ ligase in joining the $DNA$ fragments.

The stickiness of the ends facilitates the action of which enzyme?

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