Question

which enzyme pairs corresponding nucleotides to a preexisting dna chain in order to synthesize a new strand of dna?
primase
dna polymerase
ligase
helicase

Explanation:

DNA polymerase is the enzyme that reads the existing DNA strand and adds complementary nucleotides to synthesize a new DNA strand during DNA replication. Primase makes RNA primers, ligase joins DNA fragments, and helicase unwinds the DNA double - helix.

Answer:

B. DNA polymerase