Question

during replication, the double helix is unwound by the enzyme select choice.

Explanation:

In DNA replication, the enzyme responsible for unwinding the double helix structure is helicase. This is a key concept in molecular biology (a subfield of Biology, which is part of Natural Science) where helicase breaks the hydrogen bonds between the base pairs to separate the two strands of DNA, allowing other replication enzymes to access the template strands.

Answer:

helicase