About This Chapter
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.
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.
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.
3. 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.
4. 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.
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.
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.
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.
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.
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.
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.
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.
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Other chapters within the CSET Science Subtest II Life Sciences (217): Practice & Study Guide course
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- Genetic Variation & Engineering
- Overview of Biological Evolution on Earth
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