Answer:
DNA polymerase
Step-by-step explanation:
DNA polymerase is the enzyme of DNA replication. DNA polymerase uses the nucleotide sequence of template DNA strand and extends the primer by addition of complementary bases in 5' to 3' direction. It adds "thymine" base to primer for every "Adenine" base present in template strand. Likewise, "cytosine" base is added to primer for every "guanine" present in the template strand.