What is responsible for the conversation of the base sequence during dna replication?

Question

a) dna polymerase working on one strand at the same time

b) unpaired bases always attracting their complementary nucleotides

c) dna helicase and polymerase are complementary

d) both strands are identical to each other

Answer 1

b.  unpaired bases always attracting their complementary nucleotides

A pairs with T, C pairs with G

A better answer is that each strand is used as a template to build the complementary strand.