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Ch 36: Viruses for High School Biology

About This Chapter

Watch video lessons and learn about the shape, classification and life cycle of viruses. Topics in this chapter include how DNA and RNA viruses replicate and virus mutation.

Viruses for High School Biology - Chapter Summary

Viruses might be tiny organisms invisible to the naked eye, but as anyone who's ever suffered the common cold knows, they can wreak havoc on their hosts. This chapter introduces you to the basics of viruses, including how they live within a host and replicate.

This chapter is broken down into convenient video lessons and includes practice quizzes and lesson transcripts to help you study and test your knowledge. Some of the things you can learn about in these lessons include:

  • Structure, shapes and classification of viruses
  • Life cycle and replication of viruses
  • Virus mutation
  • Lytic and lysogenic virus cycles
  • Flu and HIV viruses
  • How viruses avoid the immune system

Video Objective
What Are Viruses? - Definition, Structure & Function Learn about the discovery and main components of a virus.
Shapes of a Virus: Helical, Icosahedral, Prolate, Complex & Enveloped Identify the different virus shapes.
The Life Cycle of a Virus: How Viruses Live, Attack & Replicate Explore the virus life cycle.
Classification of Viruses: Viral Genome and Replication Scheme Outline how viruses are classified.
Replication of DNA Viruses Examine the process by which DNA viruses replicate inside their host.
Replication of RNA Viruses Discover how RNA viruses reproduce within a cell
How Viruses Mutate: Antigenic Drift and Antigenic Shift Methods viruses use to evade the immune system.
Viruses: Bacteriophage Lytic and Lysogenic Cycles Discuss the two life cycles of a virus.
Flu Viruses, HIV and Immune System Evasion Go into detail about two well-known viruses.

7 Lessons in Chapter 36: Viruses for High School Biology
Test your knowledge with a 30-question chapter practice test
What Are Viruses? - Definition, Structure & Function

1. What Are Viruses? - Definition, Structure & Function

In this lesson, you'll learn some historical facts about viruses and the material they are composed of. Find out more as we review the capsid, nucleic acids, the viral envelope, viruses, virions, bacteriophages and virology.

Shapes of a Virus: Helical, Icosahedral, Prolate, Complex & Enveloped

2. Shapes of a Virus: Helical, Icosahedral, Prolate, Complex & Enveloped

Learn about the different shapes viruses can have, such as helical, icosahedral, prolate, complex and enveloped. Find out why one shape is particularly useful from an energetic standpoint.

The Life Cycle of a Virus: How Viruses Live, Attack & Replicate

3. The Life Cycle of a Virus: How Viruses Live, Attack & Replicate

Find out how viruses infect and replicate as we explore the important steps of the virus life cycle, including attachment, uncoating, penetration, replication, and release, as well as the lysogenic and lytic cycles.

Classification of Viruses: Viral Genome and Replication Scheme

4. Classification of Viruses: Viral Genome and Replication Scheme

Find out how viruses are classified based on their being double-stranded, single-stranded, positive-sense, negative-sense, or by having something called reverse transcriptase.

Replication of DNA Viruses

5. Replication of DNA Viruses

This lesson will give you a basic overview of how DNA viruses replicate inside of a host cell. We will cover the entry, integration, replication and release of DNA viruses.

Replication of RNA Viruses

6. Replication of RNA Viruses

This lesson will give you a basic overview of how different types of RNA viruses replicate inside of an animal cell. We will cover the essence of being double-stranded and retroviruses, as well as positive-and negative-sense RNA viruses.

How Viruses Mutate: Antigenic Drift and Antigenic Shift

7. How Viruses Mutate: Antigenic Drift and Antigenic Shift

This lesson will discuss the major ways by which viruses, notably the flu virus, mutates. We will talk about recombination, reassortment, antigenic drift, antigenic shift, and more!

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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