What is the role of DNA ligase in the elongation of the lagging strand during DNA replication?
A) It synthesizes RNA nucleotides to make a primer.
B) It catalyzes the lengthening of telomeres.
C) It joins Okazaki fragments together.
D) It unwinds the parental double helix.
E) It stabilizes the unwound parental DNA.

Question

Quizplus · Accepted Answer

DNA ligase joins the Okazaki fragments together, which are the short DNA fragments formed on the lagging strand during DNA replication.

Answer: A, B, D, E are incorrect 
 None of these options describe the role of DNA ligase in the elongation of the lagging strand. DNA ligase does not synthesize RNA nucleotides to make a primer, it does not catalyze the lengthening of telomeres, it does not unwind the parental double helix, and it does not stabilize the unwound parental DNA.

What Is the Role of DNA Ligase in the Elongation