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Ch 2: Nucleic Acids & DNA Replication

About This Chapter

The Nucleic Acids & DNA Replication chapter of this Molecular Biology: Help and Review course is the simplest way to master material on nucleic acids and DNA replication. This chapter uses simple and fun videos that are about five minutes long, plus lesson quizzes and a chapter exam to ensure you learn the essentials of nucleic acids and DNA replication.

Who's It For?

Anyone who needs help learning or mastering nucleic acids and DNA replication material will benefit from the lessons in this chapter. There is no faster or easier way to learn about nucleic acids and DNA replication. Among those who would benefit are:

  • Students who have fallen behind in understanding the chemical structure of nucleic acids and the distinctions between DNA and RNA
  • Students who struggle with learning disabilities or learning differences, including autism and ADHD
  • Students who prefer multiple ways of learning biology (visual or auditory)
  • Students who have missed class time and need to catch up
  • Students who need an efficient way to learn about nucleic acids and DNA replication
  • Students who struggle to understand their teachers
  • Students who attend schools without extra biology learning resources

How It Works:

  • Find videos in our course that cover what you need to learn or review.
  • Press play and watch the video lesson.
  • Refer to the video transcripts to reinforce your learning.
  • Test your understanding of each lesson with short quizzes.
  • Verify you're ready by completing the Nucleic Acids and 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 Nucleic Acids and DNA Replication chapter exam to be prepared.
  • Get Extra Support: Ask our subject-matter experts any nucleic acids and DNA replication question. They're here to help!
  • Study With Flexibility: Watch videos on any web-ready device.

Students Will Review:

This chapter helps students review the concepts in a Nucleic Acids and DNA Replication unit of a standard molecular biology course. Topics covered include:

  • Nucleotides
  • Phosphodiester bonds
  • Hereditary molecules
  • mRNA, tRNA and rRNA
  • DNA replication
  • DNA double helix
  • DNA polymerase and RNA primase
  • The leading strand
  • Replication bubbles and lagging strands

11 Lessons in Chapter 2: Nucleic Acids & DNA Replication
Test your knowledge with a 30-question chapter practice test
Nucleotides: Structure & Components

1. Nucleotides: Structure & Components

Nucleotides have 3 parts and play an important part in DNA. Understand the structure and components of nucleotides, and examine the beginning, types, and functions of nucleotides.

DNA: Chemical Structure of Nucleic Acids & Phosphodiester Bonds

2. DNA: Chemical Structure of Nucleic Acids & Phosphodiester Bonds

Nucleic acids are large biomolecules used to store, transfer and convey genetic information in cells. Explore the structure of nucleotides and what polynucleotide and phosphodiester bonds do.

DNA: Adenine, Guanine, Cytosine, Thymine & Complementary Base Pairing

3. DNA: Adenine, Guanine, Cytosine, Thymine & Complementary Base Pairing

The four nitrogenous bases found is DNA are adenine, guanine, cytosine and thymine. Discover the base pairs of these nitrogenous bases and why DNA strands are antiparallel.

DNA: Discovery, Facts, Structure & Function in Heredity

4. DNA: Discovery, Facts, Structure & Function in Heredity

The discovery of DNA is the foundation of all research in molecular biology. Learn the facts about the discovery of DNA, its structure, and the function of DNA in heredity.

Differences Between RNA and DNA & Types of RNA (mRNA, tRNA & rRNA)

5. Differences Between RNA and DNA & Types of RNA (mRNA, tRNA & rRNA)

DNA and RNA, the nucleic acids essential in molecular biology, differ in their sugar components. Learn about the differences between DNA and RNA, which includes mRNA, tRNA, and rRNA, and discover the differences in their structure and their functions.

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

6. 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

7. 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

8. 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

9. 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

10. 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.

What is Annealing? - Definition, Biology & Process

11. What is Annealing? - Definition, Biology & Process

Scientists know a lot about how DNA behaves, including that annealing describes how two strands of DNA join up to form one molecule. What does DNA look like, how does it behave, and why do we want to know?

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.
Not Taken

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