Multiple Choice
During DNA replication, DNA polymerase is an enzyme responsible for adding complementary ______ to the growing DNA strand.
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8. DNA Replication
Overview of DNA Replication
Multiple Choice
During DNA replication, which enzyme unwinds ("unzips") the DNA double helix by breaking hydrogen bonds between base pairs at the replication fork?
A
DNA polymerase
B
Primase
C
DNA helicase
D
DNA ligase
Verified step by step guidance1
Understand the role of each enzyme listed in the problem during DNA replication.
Recall that DNA polymerase is responsible for adding nucleotides to the growing DNA strand, not for unwinding the helix.
Recognize that primase synthesizes RNA primers to initiate DNA synthesis but does not unwind the DNA.
Know that DNA ligase joins Okazaki fragments on the lagging strand but does not separate the strands.
Identify that DNA helicase is the enzyme that unwinds the DNA double helix by breaking hydrogen bonds between base pairs at the replication fork.
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