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Replication in Eukaryotes

Replication in Eukaryotes

Replication in Eukaryotes

Replication in Eukaryotes

In eukaryotic cells, DNA replication is highly conserved and tightly regulated. Multiple linear chromosomes must be duplicated with high fidelity before cell division, so there are many proteins that fulfill specialized roles in the replication process. Replication occurs in three phases: initiation, elongation, and termination, and ends with two complete sets of chromosomes in the nucleus.
Many Proteins Orchestrate Replication at the Origin
Eukaryotic replication follows many of the same...

Replication in Eukaryotes

Replication in Eukaryotes

In eukaryotic cells, DNA replication is highly conserved and tightly regulated. Multiple linear chromosomes must be duplicated with high fidelity before cell division, so there are many proteins that fulfill specialized roles in the replication process. Replication occurs in three phases: initiation, elongation, and termination, and ends with two complete sets of chromosomes in the nucleus.
Many Proteins Orchestrate Replication at the Origin
Eukaryotic replication follows many of the same...

Replication in Eukaryotes

Replication in Eukaryotes

The Replisome

The Replisome

DNA replication is carried out by a large complex of proteins that act in a coordinated matter to achieve high-fidelity DNA replication. Together this complex is known as the DNA replication machinery or the replisome.
The synthesis of the leading and lagging strands is a highly coordinated process. To explain this, the “Trombone model” was proposed by Bruce Alberts in 1980. The DNA loop formation starts when a primer is synthesized on the parent lagging strand. The loop grows with the...

The Replisome

The Replisome

DNA replication is carried out by a large complex of proteins that act in a coordinated matter to achieve high-fidelity DNA replication. Together this complex is known as the DNA replication machinery or the replisome.
The synthesis of the leading and lagging strands is a highly coordinated process. To explain this, the “Trombone model” was proposed by Bruce Alberts in 1980. The DNA loop formation starts when a primer is synthesized on the parent lagging strand. The loop grows with the...

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Related Experiment Video

Updated: Jun 12, 2026

Direct Restart of a Replication Fork Stalled by a Head-On RNA Polymerase

Direct Restart of a Replication Fork Stalled by a Head-On RNA Polymerase

Published on: April 29, 2010

Closing the circle: replicating RNA with RNA.

Leslie K L Cheng¹, Peter J Unrau

¹Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada.

Cold Spring Harbor Perspectives in Biology

|June 18, 2010

Summary

This summary is machine-generated.

Scientists explore the origins of life, focusing on RNA's potential role. Research discusses ribozymes for nucleotide synthesis and RNA replication, aiding understanding of early evolution.

Related Experiment Videos

Last Updated: Jun 12, 2026

Direct Restart of a Replication Fork Stalled by a Head-On RNA Polymerase

Direct Restart of a Replication Fork Stalled by a Head-On RNA Polymerase

Published on: April 29, 2010

Area of Science:

Astrobiology and evolutionary biology, focusing on the origins of life.

Background:

The emergence of life on Earth remains a fundamental scientific question.
Evidence suggests early life may have utilized RNA for catalytic and self-recognition functions.
Understanding early life's RNA-based systems is key to deciphering complex metabolic pathways.

Purpose of the Study:

To explore the challenges in constructing a laboratory-based, RNA-replicating system.
To provide insights into the earliest evolutionary steps and the establishment of metabolic systems.

Main Methods:

Discusses recent advancements in the selection and characterization of ribozymes.
Focuses on ribozymes that catalyze nucleotide synthesis and RNA polymerization.

Main Results:

Highlights progress in identifying and characterizing functional ribozymes.
Summarizes current challenges in achieving RNA-mediated RNA replication.

Conclusions:

RNA-based systems offer a plausible model for early life.
Further research into ribozyme function is crucial for understanding life's origins.