DNA ligase is an essential enzyme that facilitates the joining of DNA strands by catalyzing the formation of phosphodiester bonds between adjacent nucleotides. It plays a critical role in DNA replication and repair by sealing breaks or “nicks” in the sugar-phosphate backbone, particularly on the lagging strand where Okazaki fragments are formed. DNA ligase ensures the continuity of the DNA molecule, maintaining its structural integrity during cellular processes like replication, recombination, and repair. This is an MCQ on DNA Ligase Enzyme with Answers. You can download these questions as PDF from the download link provided in the results page of this quiz.
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