Question

DNA helicase is an enzyme responsible
for (what) the double
strand of DNA.

Answer 1

Answer:

Helicases are enzymes that are responsible for untwisting the double helix at the replication forks, separating the two strands and making them available to serve as templates for DNA replication

Explanation:

Answer 2

The enzyme is responsible for separating the two stands of DNA in a helix so that they can be copied during DNA replication.