HardBotany
+4 / -1
The enzyme responsible for DNA replication during S phase is:
A
DNA polymerase
B
RNA polymerase
C
Helicase only
D
Ligase only
Explanation
DNA polymerase is the key enzyme for DNA synthesis during S phase, but it requires a primer (made by primase). Helicase unwinds the double helix, DNA polymerase adds nucleotides 5'→3', and DNA ligase joins Okazaki fragments on the lagging strand.
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