Ch 13: Control of Gene Expression

About This Chapter

Our experienced instructors make control of gene expression easy to understand in this chapter, even if you've struggled with this concept before. You'll find short lessons and self-assessment quizzes you can use to study for a test, catch up in class or finish a tough homework assignment.

Control of Gene Expression - Chapter Summary

With this chapter, you're welcome to study control of gene expression any time that works best for you. Topics outlined here include regulation of gene expression, the transcription factor and RNA processing in eukaryotic cellS. You can access these resources on any smartphone, tablet or computer for a completely flexible and convenient study experience. If you get stuck on any of these concepts, reach out to an expert through the Dashboard with your questions. After finishing this chapter, you should be able to:

  • Outline transcriptional repression and induction in the regulation of gene expression
  • Explain how an operon controls transcription in a prokaryotic cell
  • Define the transcription factor and its identification
  • Provide examples of eukaryotic transcription regulation
  • Identify the splicing of introns and exons in RNA processing in eukaryotic cells
  • Give the definition and processes of RNA editing
  • Discuss how siRNA molecules inhibit mRNAs
  • Detail the role, steps and structure of MicroRNAs (miRNAs)

8 Lessons in Chapter 13: Control of Gene Expression
Test your knowledge with a 30-question chapter practice test
Regulation of Gene Expression: Transcriptional Repression and Induction

1. 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.

How An Operon Controls Transcription in a Prokaryotic Cell

2. How An Operon Controls Transcription in a Prokaryotic Cell

Is gene regulation really as simple as flipping a switch? What are the parts of an operon, and how do they function to control gene transcription? We'll study the lac operon to answer these questions.

Transcription Factor: Definition & Identification

3. Transcription Factor: Definition & Identification

What is a transcription factor? Transcription factors are one of several ways cells regulate genetic expression. In this lesson we will cover how transcription factors were first identified and how they function.

Examples of Transcription Regulation in Eukaryotes

4. 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.

RNA Processing in a Eukaryotic Cell: Splicing of Introns & Exons

5. RNA Processing in a Eukaryotic Cell: Splicing of Introns & Exons

In this lesson, we'll explore the unique considerations for gene regulation in the eukaryotic cell. We'll walk through RNA splicing of introns and exons and the addition of the 5' cap and poly(A) tail.

RNA Editing: Definition & Processes

6. RNA Editing: Definition & Processes

In this lesson, we'll be learning about RNA editing. We'll explain what RNA editing is and look at different mechanisms, such as addition, deletion, and substitution through deamination and chemical alternation.

RNAi: How siRNA Molecules Inhibit mRNAs

7. RNAi: How siRNA Molecules Inhibit mRNAs

In this lesson, you will learn how siRNA helps cells fight viruses and controls gene expression and how scientists are using siRNA to understand genetic diseases and develop new therapies.

MicroRNAs (miRNAs): Role, Structure & Steps

8. MicroRNAs (miRNAs): Role, Structure & Steps

In this lesson, we'll be exploring the world of microRNAs (miRNAs). Here, we'll explain the role of miRNAs, their structure and the steps needed to control gene expression.

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.
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