The complementary strands of DNA to form a -shaped replication fork New pairs are formed according to base pairing rules Each double-stranded DNA is made of one strand and one strand of DNA

The complementary strands of DNA Unwind to form a _Y___-shaped replication fork New __Neucleotide base pairs are formed according to base pairing rules Each double-stranded DNA is made of one _old strand and one ___new strand of DNA

Explanation:

Central dogma is the process by which proteins are synthesized from genetic information. It comprises of replication, transcription and translation. In replication the new copy of DNA is synthesized.

The double stranded DNA is unwound by helicase enzyme.A primer is added by RNA polymerase to start replication by DNA polymerase.DNA polymerase can add the nucleotides in only in 5' to 3' direction so it synthesizes one strand of DNA continuously known as "leading strand" and  one strand in fragments known as "lagging strand"Ligase enzyme join the fragments of lagging strand.The new DNA molecule contains the one old strand and one new strand

A, if i am wrong correct me

The direction a chemical reaction occurs is represented by an arrow