Multiple Choice
What is the primary role of DNA polymerase during DNA replication?
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14. DNA Synthesis
DNA Polymerases
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Which enzyme builds the new DNA strand by adding nucleotides during DNA replication?
A
DNA polymerase
B
Ligase
C
Primase
D
Helicase
Verified step by step guidance1
Understand the role of each enzyme listed in the options during DNA replication.
DNA polymerase is the enzyme responsible for adding nucleotides to the growing DNA strand, synthesizing the new strand in the 5' to 3' direction.
Ligase is an enzyme that joins Okazaki fragments on the lagging strand, sealing nicks in the sugar-phosphate backbone.
Primase synthesizes a short RNA primer that provides a starting point for DNA polymerase to begin DNA synthesis.
Helicase unwinds the DNA double helix, separating the two strands to allow replication to occur.
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