Which of the following enzymes unwind DNA?: (A) Ligase, (B) DNA primase, (C) Helicase, (D) DNA polymerase
Answer is C. Helicases are enzymes that bind and may even remodel nucleic acid or nucleic acid-protein complexes. There are DNA and RNA helicases. DNA helicases are essential during DNA replication because they separate double-stranded DNA into single strands allowing each strand to be copied Ref-Sathyanarayana 4/e p401