Replication proceeds outwards from 2 replication forks (moves in 2 opposite directions!), known as bidirectional replication.
Localised region of replication that moves progressively along the parental DNA double helix. This active region is called replication fork.
At the replication fork, a multi-enzyme complex, that contains DNA polymerase synthesises the DNA of both new daughter strands.
A-T base pair, held by fewer hydrogen bonds than G-C base pair, therefore DNA rich in A-T easier to pull apart and regions of DNA enriched with A-T base pairs are typically found at replication origins.