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Ch 25: Processes and Steps of DNA Replication for the MCAT: Help and Review

About This Chapter

The Process and Steps of DNA Replication chapter of this Medical College Admission Test (MCAT) Help and Review course is the simplest way to master DNA replication. This chapter uses simple and fun videos that are about five minutes long, plus lesson quizzes and a chapter exam to ensure students learn the essentials of DNA replication.

Who's it for?

Anyone who needs help preparing for the science section of the MCAT exam will benefit from taking this course. You will be able to grasp the subject matter faster, retain critical knowledge longer and earn better grades. You're in the right place if you:

  • Have fallen behind in understanding the models of DNA replication or the roles of enzymes involved in this process.
  • Need an efficient way to learn about DNA replication.
  • Learn best with engaging auditory and visual tools.
  • Struggle with learning disabilities or learning differences, including autism and ADHD.
  • Experience difficulty understanding your teachers.
  • Missed class time and need to catch up.
  • Can't access extra MCAT science preparation resources at school.

How it works:

  • Start at the beginning, or identify the topics that you need help with.
  • Watch and learn from fun videos, reviewing as needed.
  • Refer to the video transcripts to reinforce your learning.
  • Test your understanding of each lesson with short quizzes.
  • Submit questions to one of our instructors for personalized support if you need extra help.
  • Verify you're ready by completing the Process and Steps of DNA Replication chapter exam.

Why it works:

  • Study Efficiently: Skip what you know, review what you don't.
  • Retain What You Learn: Engaging animations and real-life examples make topics easy to grasp.
  • Be Ready on Test Day: Use the Process and Steps of DNA Replication chapter exam to be prepared.
  • Get Extra Support: Ask our subject-matter experts any relevant question. They're here to help!
  • Study With Flexibility: Watch videos on any web-ready device.

Students will review:

In this chapter, you'll learn the answers to questions including:

  • What are the conservative, semi-conservative and dispersive models of DNA replication?
  • How does the helicase unwind the DNA double helix prior to replication?
  • When do DNA polymerase and RNA primase begin DNA replication?
  • How are DNA polymerase and leading strand actions different?
  • How do leading and lagging strands, enzymes and replication bubbles work together during the replication process?

8 Lessons in Chapter 25: Processes and Steps of DNA Replication for the MCAT: Help and Review
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.

Examples of Transcription Regulation in Eukaryotes

6. Examples of Transcription Regulation in Eukaryotes

Transcription is more complicated than just turning a gene 'on' or 'off' like a light switch. In this lesson, you'll learn how eukaryotic transcription is regulated through the use of DNA regulatory regions, DNA methylation, and chromatin modification.

Genetic Engineering & DNA Plasmid

7. Genetic Engineering & DNA Plasmid

This lesson will discuss what a GMO is, and how DNA plasmids are used in genetic engineering. The lesson will include these important features of plasmids: a multiple cloning site, an origin of replication, and a selectable marker.

Practical Applications & Safety Concerns of DNA Technology

8. Practical Applications & Safety Concerns of DNA Technology

Our discovery of DNA was a big deal, but what technologies has it led to? And could they be dangerous? Learn about DNA technology, and then test your knowledge with a quiz.

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Other Chapters

Other chapters within the MCAT Prep: Help and Review course

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