What is the enzyme that unwinds DNA prior to replication?

The enzyme that unwinds DNA prior to replication is called helicase. Helicase plays a crucial role in DNA replication by breaking the hydrogen bonds between the base pairs of the double-stranded DNA molecule, allowing the two strands to separate and form the replication fork. This process is essential for the replication of DNA during cell division and ensures that the genetic information is accurately copied.