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Which option gives a wrong function of ligase?

Answer and explanation

Correct answer: Cutting DNA at a recognition site

DNA ligase seals nicks in the sugar-phosphate backbone by forming phosphodiester bonds. Thus, it joins DNA fragments, including Okazaki fragments formed during replication. Cutting DNA at a specific recognition site is carried out by a restriction endonuclease, not by ligase. Exam tip: remember ligase as the DNA “joining” enzyme and restriction enzymes as DNA “cutting” enzymes.

Related tags

Dna LigaseRestriction EndonucleaseOkazaki FragmentsDna ReplicationGenetic EngineeringLigase EnzymesPrinciples Of BiotechnologyBiotechnology

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