Question

multiple - choice question which of the following fills in the blanks correctly? __________ unzips the dna, then the enzyme ________ adds free nucleotides to each of the exposed strands of dna by attaching the correct ________ together with __________ bonds. helicase unzips the dna, then the enzyme dna polymerase adds free nucleotides to each of the exposed strands of dna by attaching the correct nitrogen bases together with hydrogen bonds.

Explanation:

Helicase is the enzyme that unwinds and unzips the double - stranded DNA. DNA polymerase adds nucleotides to the exposed DNA strands during replication. Nitrogen bases pair up with each other in DNA, and they are held together by hydrogen bonds.

Answer:

Helicase, DNA polymerase, nitrogen bases, hydrogen