Question

there are three steps that are required for dna replication. the first step, unwinding, is accomplished by the enzyme
multiple choice
topoisomerase.
rna polymerase.
dna ligase.
dna polymerase.
helicase.

Explanation:

DNA replication begins with unwinding the double - helix structure. Helicase is the enzyme that breaks the hydrogen bonds between base pairs, allowing the two strands to separate. Topoisomerase relieves supercoiling, RNA polymerase is for transcription, DNA ligase joins DNA fragments, and DNA polymerase synthesizes new DNA strands.

Answer:

helicase