Ch 8: MCAS STE Biology: DNA Replication

About This Chapter

Use the lessons in this chapter to review the various processes involved in the duplication of DNA so that you can feel prepared for questions about DNA replication on the MCAS STE Biology exam.

MCAS STE Biology: DNA Replication - Chapter Summary

DNA contains all of the pieces that make us exactly who we are. Every cell in our body that contains a nucleus also contains DNA. Therefore, when new cells are being formed, our DNA must be replicated. In this chapter we will review with you the process of DNA replication so that you can feel prepared for related questions on the MCAS STE Biology exam. The lessons will cover:

  • Conservative, semi-conservative and dispersive replication
  • Unwinding of the double helix before replication
  • How DNA polymerase and RNA primase is used to begin reproduction
  • The leading strand and the functions of DNA polymerase
  • Enzymes, replication bubbles, leading and lagging strands

The lessons in this chapter have been carefully formulated to provide you with effective methods for learning and retaining DNA material. Each lesson contains a video along with its transcript for visual and text-based learning. There is a clickable timeline below each video so you can return to a particular section if you need to review it. Use the self-assessment quizzes at the end of each lesson for you to gauge how well you understand the material.

MCAS STE Biology: DNA Replication Chapter Objectives

The MCAS STE Biology exam is a standardized test taken by high school students in Massachusetts. The exam assesses students' level of proficiency in biology as determined by the Massachusetts Curriculum Framework. The exam consists of five main content areas related to biology. The information covered in this chapter will help prepare you for questions on the test related to genetics, which account for 20% of the entire score.

The MCAS STE Biology exam is comprised of 40 multiple-choice questions and 5 open-ended responses. The open-ended responses could be related to any of the five content areas so it's important to study for all of them. You will need to pass one of the four STE exams with a score of 220 or higher to qualify for graduation.

5 Lessons in Chapter 8: MCAS STE 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

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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