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A) DNA polymerase III synthesizes new DNA strands by adding nucleotides to the 3' end of a primer during DNA replication. B) RNA primase initiates DNA replication by synthesizing a short RNA primer required for DNA polymerase to begin strand elongation. C) DNA polymerase I removes RNA primers from the lagging strand and replaces them with DNA nucleotides during DNA replication. D) Helicase unwinds the DNA double helix ahead of the replication fork, separating the two strands to allow replication machinery access. E) DNA ligase seals nicks in the DNA backbone by forming phosphodiester bonds between adjacent nucleotides, completing DNA replication and repair processes. Problem: DNA is unwound by: A) DNA polymerase III B) RNA primase C) DNA polymerase I D) Helicase E) DNA ligase
