a) DNA Gyrase: Relieves supercoiling in DNA ahead of the replication fork during DNA replication and transcription. b) DNA Polymerase: Synthesizes new DNA strands by adding nucleotides complementary to the template strand and also performs proofreading to correct errors. c) DNA Helicase: Unwinds the DNA double helix by breaking the hydrogen bonds between complementary base pairs, separating the two strands. That's 2 down. 3 left today — send the next one.