Multiple Choice
During DNA replication, what are two key functions of DNA polymerase?
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8. DNA Replication
Overview of DNA Replication
Multiple Choice
In the overview of DNA replication, which enzyme primarily catalyzes the synthesis of new DNA strands by adding nucleotides to the growing chain?
A
Helicase
B
DNA polymerase
C
RNA polymerase
D
DNA ligase
Verified step by step guidance1
Understand the role of each enzyme listed in the problem: Helicase, DNA polymerase, RNA polymerase, and DNA ligase.
Recall that Helicase unwinds the DNA double helix to separate the two strands, preparing them for replication but does not synthesize new DNA.
Recognize that RNA polymerase synthesizes RNA from a DNA template during transcription, not DNA replication.
Know that DNA ligase joins Okazaki fragments on the lagging strand by forming phosphodiester bonds but does not add nucleotides to the growing DNA strand.
Identify DNA polymerase as the enzyme that catalyzes the addition of nucleotides to the 3' end of the growing DNA strand, synthesizing new DNA during replication.
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