About This Chapter
TExES Life Science: DNA Replication - Chapter Summary
This chapter includes a series of engaging lesson videos about the structures and stages of DNA replication, intended to prepare you for related questions on the TExES Life Science test. These videos are taught by expert instructors who are available to answer any questions you may have so that you can improve your understanding of:
- Conservative, semi-conservative and dispersive models of DNA replication
- Helicase and the unwinding of the DNA double helix
- DNA polymerase and RNA primase
- DNA polymerase and leading strands
- Enzymes, replication bubbles, leading strands and lagging strands
Test your understanding of the material by taking lesson quizzes. You can reexamine anything in the videos with ease by using the Timeline feature or the video tags.
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!
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.
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.
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.
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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Other chapters within the TExES Life Science 7-12 (238): Practice & Study Guide course
- TExES Life Science: Overview of the Field
- TExES Life Science: Scientific Inquiry
- TExES Life Science: Lab Equipment, Processes & Safety
- TExES Life Science: Matter & Atomic Structure
- TExES Life Science: Cell Biology
- TExES Life Science: Prokaryotic Cells
- TExES Life Science: Cell Communication
- TExES Life Science: Inorganic Chemistry
- TExES Life Science: Organic Compounds
- TExES Life Science: Nucleic Acids
- TExES Life Science: Enzymes
- TExES Life Science: Protists, Fungi & Viruses
- TExES Life Science: Metabolic Biochemistry
- TExES Life Science: DNA Transcription & Translation
- TExES Life Science: Cell Cycle & Division
- TExES Life Science: Genetics & Heredity
- TExES Life Science: Genetic Mutations
- TExES Life Science: Biological Evolution
- TExES Life Science: Taxonomy & the Diversity of Life
- TExES Life Science: Plant Cells
- TExES Life Science: Plant Biology
- TExES Life Science: Plant Reproduction & Growth
- TExES Life Science: Animals
- TExES Life Science: Human Body Systems
- TExES Life Science: Human Reproduction & Development
- TExES Life Science: Homeostasis of Organisms
- TExES Life Science: Biology & Behavior
- TExES Life Science: Interdependence of Life & Environmental Systems
- Learning & Instruction for the Science Classroom