Ch 8: DNA & Gene Expression

About This Chapter

Use this chapter on DNA and gene expression to assist you as you prepare for an important test or finish your homework. Our expert instructors explain this material in user-friendly video lessons accessible from any computer or mobile device 24 hours a day.

DNA & Gene Expression - Chapter Summary

This collection of video lessons covers DNA and gene expression for your convenient study. Just a few of the subjects discussed in this chapter include the structure of DNA, the discovery of DNA and its function in heredity, plus complementary base pairing in DNA. After finishing this chapter, you should be ready to:

  • Identify the chemical structure of phosphodiester bonds and nucleic acids
  • Explain how DNA is packaged
  • Express knowledge of genes and their structure
  • Detail the regulation and analysis of gene expression
  • Outline the regulation of gene expression
  • Discuss codon recognition and the genetic code
  • Explore the way in which tRNA and anticodons interpret the genetic code
  • Determine the role of RNA in protein synthesis

Work as slowly or as quickly as you like, and go back to review these videos as many times as needed using the video tabs for quick navigation. Our printable lesson transcripts make beneficial study guides for study and offline review. Prior to testing or looking into other subjects, take the lesson quizzes and chapter test to ensure you're ready.

11 Lessons in Chapter 8: DNA & Gene Expression
Test your knowledge with a 30-question chapter practice test
What is DNA? - Structure, Overview

1. What is DNA? - Structure, Overview

This lesson will explore the race to find the structure of the DNA molecule, the parts of that structure and how they fit together, and how this knowledge has been used to advance mankind.

DNA: Discovery, Facts, Structure & Function in Heredity

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

This lesson will help you to navigate the twists and turns of DNA's structure. We'll also clue you in on the amazing discoveries that put this nucleic acid in the limelight as the molecule of heredity.

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

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

Learn the language of nucleotides as we look at the nitrogenous bases adenine, guanine, cytosine and thymine. Armed with this knowledge, you'll also see why DNA strands must run in opposite directions.

DNA: Chemical Structure of Nucleic Acids & Phosphodiester Bonds

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

In this lesson, you'll discover what nucleotides look like and how they come together to form polynucleotides. We'll also explore nucleic acids and focus on DNA in particular.

How is DNA Packaged? - Chromosome Condensation & Karyograms

5. How is DNA Packaged? - Chromosome Condensation & Karyograms

Learn how DNA packaging makes it possible to fit approximately seven feet of DNA inside a single cell. You'll see how chromosome condensation helps cells get ready for cell division.

What Is a Gene? - Definition & Structure

6. What Is a Gene? - Definition & Structure

Genes are little codes found in our cells that make up who we are. This lesson covers where genes are located, how we get our genes, and the functions of genes.

What Is Gene Expression? - Regulation, Analysis & Definition

7. What Is Gene Expression? - Regulation, Analysis & Definition

What is a gene? How are genes expressed? What does the term gene expression mean? Can we analyze gene expression? These questions will be addressed in this lesson.

Regulation of Gene Expression: Transcriptional Repression and Induction

8. Regulation of Gene Expression: Transcriptional Repression and Induction

Do our genes work the same way all the time? How do we regulate the expression of our genes? Explore the various ways organisms control gene transcription through repression and induction of operons.

Making Sense of the Genetic Code: Codon Recognition

9. Making Sense of the Genetic Code: Codon Recognition

Explore the genetic code and how it is translated into a polypeptide. We'll practice using the RNA codon chart and learn the basics of codon recognition.

Codon Recognition: How tRNA and Anticodons Interpret the Genetic Code

10. Codon Recognition: How tRNA and Anticodons Interpret the Genetic Code

How does codon recognition work at the molecular level? Can you use tRNA and anticodons to decipher the genetic code? Learn the mechanics of codon recognition and build a polypeptide from a sample genetic code.

What Is the Role of DNA in Protein Synthesis?

11. What Is the Role of DNA in Protein Synthesis?

What purpose does DNA serve inside the cell? How does DNA contribute to protein synthesis? Learn the answers to these questions and more in this lesson.

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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