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Ch 8: Processes & Steps of DNA Replication

About This Chapter

Watch video lessons about the chemical nature of the gene and learn about DNA replication. Read on to find out more about these learning materials and what they cover.

DNA Replication - Chapter Summary and Course Objectives

The information that determines your genetic identity is preserved at the cellular level, and the chemical nature of the gene makes this possible, as you will learn in this chapter. These lessons cover DNA replication. Through our lessons, you will learn the patterns and attributes that make this double helix the ultimate coding and proofreading machine. You'll also study replication forks, parental strands and daughter strands, as well as leading and lagging strands. If these terms seem like complete strangers now, you'll soon view them as old friends. By the end of these lessons, you'll understand:

  • How primase aids DNA polymerase
  • What Okazaki fragments are
  • What happens before DNA replication begins
  • Models of DNA replication
  • The roles of different enzymes in the replication process

Video Objective
What is DNA Replication? - Conservative, Semi-Conservative & Dispersive Models Study the different types of DNA replication models.
How Helicase Unwinds the DNA Double Helix in Preparation for Replication Explore the origin of replication.
How DNA Polymerase and RNA Primase Initiate DNA Replication Examine the roles of RNA primase, RNA primase and DNA polymerase
Replication of the Leading and Lagging Strands of DNA Discover how leading strand, lagging strand, Okazaki fragment and DNA ligase are related to DNA replication.
DNA Replication: Review of Enzymes, Replication Bubbles & Leading and Lagging Strands Review DNA replication in-depth with a look at detailed concepts and enzymes.

5 Lessons in Chapter 8: Processes & Steps of DNA Replication
What Is DNA Replication? - Conservative, Semi-Conservative & Dispersive Models

1. What Is DNA Replication? - Conservative, Semi-Conservative & Dispersive Models

How do we know that DNA replication is semi-conservative? How do we know it's not conservative or dispersive? Let's follow the famous experiment by Meselson and Stahl to find out!

How Helicase Unwinds the DNA Double Helix in Preparation for Replication

2. How Helicase Unwinds the DNA Double Helix in Preparation for Replication

How does semi-conservative replication begin? Discover how DNA helicase creates a replication fork to unwind the complicated DNA molecule and allow daughter strands to form on the parental template.

How DNA Polymerase and RNA Primase Initiate DNA Replication

3. How DNA Polymerase and RNA Primase Initiate DNA Replication

How do enzymes assist in starting DNA replication? In this lesson, we explore the work of a contributing enzyme, DNA polymerase, and learn how the RNA primer is made by the action of RNA primase.

DNA Replication: The Leading Strand and DNA Polymerase Activities

4. DNA Replication: The Leading Strand and DNA Polymerase Activities

How does replication occur in the antiparallel DNA molecule? In this lesson, explore the significance of the leading and lagging strands, and learn how Okazaki fragments and RNA ligase make DNA replication possible.

DNA Replication: Review of Enzymes, Replication Bubbles & Leading and Lagging Strands

5. DNA Replication: Review of Enzymes, Replication Bubbles & Leading and Lagging Strands

Feeling lost in the thorny details of DNA replication? This lesson provides an overview of semi-conservative replication, with a focus on putting together all of the concepts involved. We'll review the work of each enzyme on our way to completing the big picture of DNA replication.

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