What feature speeds up DNA replication in eukaryotes?

The correct answer highlights the importance of having multiple replication forks in eukaryotic DNA replication. Eukaryotic cells are often quite large and contain a substantial amount of DNA organized into multiple linear chromosomes. To efficiently replicate this extensive genetic material, eukaryotic cells utilize numerous origins of replication along each chromosome.

Each origin of replication generates a replication fork, where DNA unwinds and serves as a template for new strand synthesis. By having multiple replication forks operating simultaneously, eukaryotic cells can significantly reduce the time it takes to replicate their entire genome as compared to a scenario where replication would only happen at a single origin. This strategy enhances the overall speed and efficiency of the DNA replication process, ensuring timely cell division and maintaining cellular function.

Contextually, while a single origin of replication would limit the process and is more characteristic of prokaryotic organisms, high enzyme concentration and large chromosome size do not directly address the efficiency of the replication process in the same manner as multiple replication forks. The coordination of these replication forks is key to the rapid and accurate duplication of the eukaryotic genome.