which enzyme breaks the hydrogen bonds during replication
Answer by Surfbanana. Confidence votes 22. Helicase and RNA polymerase separate DNA strands by breaking the hydrogen bonds between complementary bases. Helicase parts the strands of DNA during DNA replication, and RNA polymerase parts them during transcription. The enzyme that separates DNA in called DNA helicases. There are two of them that work away from the origin of replication, creating in bubble in the DNA molecule.