DNA is tightly wound in a double helix for much of the time. Which of the following enzymes unwinds the double helix and begins transcription of RNA?
A) RNA polymerase
B) DNA polymerase
C) transcriptase
D) RNA isomerase

Question

Quizplus · Accepted Answer

RNA polymerase is the enzyme that unwinds the double helix and begins transcription of RNA. DNA polymerase is primarily involved in DNA replication and proofreading of newly synthesized DNA. Transcriptase is not a commonly used term for an enzyme involved in transcription, and RNA isomerase is not a known enzyme.

DNA Is Tightly Wound in a Double Helix for Much