Ch 12: AP Biology: DNA Replication

About This Chapter

Watch DNA replication video lessons and learn about enzymes, important steps, replication bubbles, and more. These lessons are just a portion of our AP Biology course.

DNA Replication: Processes and Steps - Chapter Summary and Learning Objectives

You know that DNA holds the codes for everything our bodies need, but do you know how it makes copies of itself for new cells? In this chapter, our instructors will show you the steps and molecules involved in this complicated process. You'll see how scientists figured out that the DNA molecule splits down the middle to prepare for replication. You'll learn the various enzymes that work together to start the process and correctly pair the nucleotide bases. After completing this chapter, you should be able to:

  • Explain the function of helicase, DNA polymerase, and RNA primase
  • Describe the steps of the replication process
  • Understand what semi-conservative replication means
  • Show how enzymes work together during replication

VideoObjective
What is DNA Replication? - Conservative, Semi-Conservative, and Dispersive ModelsTake a look at a famous experiment to see how we know the mechanism for DNA replication.
How Helicase Unwinds the DNA Double Helix in Preparation for ReplicationStudy this important enzyme and the work it does to begin the process of replication.
How DNA Polymerase and RNA Primase Initiate DNA ReplicationLearn about how these two enzymes put together parts of new DNA strands in semi-conservative replication.
DNA Replication: Review of Enzymes, Replication Bubbles, and Leading and Lagging StrandsUnderstand how the parts of DNA replication fit together in this overview of the entire replication process.

5 Lessons in Chapter 12: AP Biology: DNA Replication
Test your knowledge with a 30-question chapter practice test
What Is DNA Replication? - Conservative, Semi-Conservative & Dispersive Models

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

DNA replication, the process of copying DNA, has three different models to explain its processes, the most well-known of which is the Meselson and Stahl model. Learn about their experiments, as well as how those experiments disproved older models.

How Helicase Unwinds the DNA Double Helix in Preparation for Replication

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

DNA helicase is a vital enzyme that unwinds the DNA double helix and prepares DNA for replication. Learn about this process by exploring the semi-conservative model of DNA replication, explore how DNA helicase unwinds the DNA double helix, and discover the origin of replication and replication fork.

How DNA Polymerase and RNA Primase Initiate DNA Replication

3. How DNA Polymerase and RNA Primase Initiate DNA Replication

DNA replication involves the process of splitting DNA molecules down the middle. Different enzymes, such as DNA polymerase and RNA primase, have different roles in this process, including building daughter strands of DNA and priming for replication. Learn about how DNA replication is started and the enzymes that help it occur.

DNA Replication: The Leading Strand and DNA Polymerase Activities

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

The beginning of DNA replication requires the splitting of two parent DNA strands. DNA polymerase makes short lengths of DNA that are then bound together by DNA ligase. Learn how these enzymes work together to aid in DNA replication.

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

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

Enzymes, parent strands, and daughter strands are parts of the process of DNA replication. Learn about the parts of DNA replication, including enzymes, replication bubbles, and leading and lagging strands.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
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