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Ch 34: Praxis Middle School Science: DNA Replication

About This Chapter

Use our video lessons about DNA replication to prepare yourself for questions you may encounter about genetics on the Praxis Middle School Science exam. Following each lesson, there is a self-assessment quiz to help gauge your readiness for test day.

Praxis Middle School Science: DNA Replication - Chapter Summary

The video lessons in this review chapter have been created by our expert instructors to help make the process of reviewing DNA replication efficient and enjoyable. The lessons are brief and easy to navigate. You can even jump between major sections of each video and watch them as many times as needed. To prepare you for the Praxis Middle School Science test, the lessons in this chapter cover topics like:

  • Conservative, semi-conservative and dispersive models of DNA replication
  • Function of helicase and other enzymes in DNA replication
  • Roles of DNA polymerase and RNA primase
  • Significance of the leading and lagging strands
  • Replication bubbles

Following each video lesson, take the short multiple-choice quiz to gauge your comprehension and retention of the information and gain confidence in your readiness for the Praxis Middle School Science test.

Objectives of the Praxis Middle School Science: DNA Replication Chapter

The Praxis Middle School Science exam assesses your readiness for certification to teach science to middle school students. The topics covered in our chapter on DNA replication correspond to two objectives covered in the life sciences section, which constitutes about 24% of the exam. These objectives relate to basic genetics as well as replication, transcription and translation. The Praxis test is computer-based with 125 total questions.

5 Lessons in Chapter 34: Praxis Middle School Science: 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

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.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

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