About This Chapter
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
|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.|
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.
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.
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.
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.
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.
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.
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!
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Other chapters within the High School Biology Textbook course
- Basic Terms & Skills in Biological Science
- Basic Science Lab Skills
- Inorganic Chemistry Review for High School Biology
- Introduction to Organic Chemistry
- Enzyme Function, Interactions & Regulation
- Cell Biology
- Requirements of Biological Systems
- Cell Communication
- Cellular Metabolism & Respiration
- Cell Growth & The Process of Cell Division
- The Nucleotide Structure of DNA & RNA
- Processes & Steps of DNA Replication
- The Transcription and Translation Process
- Mendelian Genetics & Mechanisms of Heredity
- Types & Effects of Genetic Mutations
- DNA Technology and Genomics
- Bacterial Biology Overview
- The Origin of the Universe and Life on Earth
- Geologic Time
- Evolution Overview
- Phylogeny and the Classification of Organisms
- Plant Biology
- Plant Reproduction and Growth
- Introduction to Fungi
- Introduction to Invertebrates
- Introduction to Vertebrates
- Physiology I: The Circulatory, Respiratory, Digestive, Excretory, and Musculoskeletal Systems
- Physiology II: The Nervous, Immune, and Endocrine Systems
- Animal Reproduction and Development
- Human Reproductive Systems
- Ecology and the Environment
- Human Effects on the Environment
- Animal Behavior
- Basic Molecular Biology Laboratory Techniques
- Analyzing Scientific Data