DNA replication in eukaryotes (and prokaryotes) is bidirectional, meaning it proceeds in two directions simultaneously from a single origin of replication.

Here's why:

* Origin of Replication: Replication starts at a specific site on the DNA molecule called the origin of replication.

* Replication Forks: Two replication forks are formed at the origin, moving in opposite directions along the DNA molecule.

* Continuous and Discontinuous Replication: One strand (leading strand) is synthesized continuously, while the other strand (lagging strand) is synthesized discontinuously in short fragments called Okazaki fragments.

This bidirectional process ensures that DNA replication is completed efficiently and quickly.