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Ch 19: Campbell Biology Chapter 19: Viruses

About This Chapter

The Viruses chapter of this Campbell Biology Companion Course helps students learn the essential lessons associated with viruses. Each of these simple and fun video lessons is about five minutes long and is sequenced to align with the Viruses textbook chapter.

How It Works:

  • Identify the lessons in the Campbell Biology Viruses chapter with which you need help.
  • Find the corresponding video lessons with this companion course chapter.
  • Watch fun videos that cover the virus topics you need to learn or review.
  • Complete the quizzes to test your understanding.
  • If you need additional help, rewatch the videos until you've mastered the material or submit a question for one of our instructors.

Students will learn:

  • The major types of infectious agents
  • The structure and function of viruses
  • Virus classification
  • The life cycle of a virus
  • Bacteriophage lytic and lysogenic cycles
  • How HIV and flu viruses evade the immune system
  • Different kinds of vaccines
  • Differences between endemics, epidemics and pandemics

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8 Lessons in Chapter 19: Campbell Biology Chapter 19: Viruses
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.

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

2. 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.

Viruses: Bacteriophage Lytic and Lysogenic Cycles

3. Viruses: Bacteriophage Lytic and Lysogenic Cycles

Viruses are generally not only our enemy but also the enemy of many other organisms. Bacteriophages are viruses that infect specific bacteria. In this lesson, we'll discuss their basic structure and infection cycle.

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.

Flu Viruses, HIV and Immune System Evasion

5. Flu Viruses, HIV and Immune System Evasion

Why is it that our immune systems can protect us from some viruses but not others? We've eradicated smallpox by using vaccines, so why do influenza and HIV remain such dangerous health risks? In this lesson about viruses, we'll explore these questions and learn how influenza and HIV continue to evade the human immune system.

Antibiotics and Vaccines

6. Antibiotics and Vaccines

Do you know why children must get regularly vaccinated? Have you ever wondered how an antibiotic works and why they are so widely prescribed? If so, this lesson will help you to understand how changes in medicine have almost eliminated several deadly diseases and added decades to the average person's lifespan.

The Spread of Disease: Endemic, Epidemic & Pandemic

7. The Spread of Disease: Endemic, Epidemic & Pandemic

This lesson will talk about what an endemic disease is and how it is different from an epidemic. We'll also discuss how an epidemic differs from something known as a pandemic. Finally, we'll look at some examples of each to help solidify these points.

Infectious Agents: Viruses, Viroids & Prions

8. Infectious Agents: Viruses, Viroids & Prions

While we tend to think of things that can actively kill us as being living entities, the fact is that non-living entities can actively kill us, as well. This lesson explores some of those entities, including viruses, viroids, and prions.

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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