About This Chapter
How it works:
- Begin your assignment or other high school biology work.
- Identify the virus concepts that you're stuck on.
- Find fun videos on the topics you need to understand.
- Press play, watch and learn!
- Complete the quizzes to test your understanding.
- As needed, submit a question to one of our instructors for personalized support.
Who's it for?
This chapter of our high school biology tutoring solution will benefit any student who is trying to learn about viruses and earn better grades. This resource can help students including those who:
- Struggle with understanding virus shapes and life cycle, classification of viruses, DNA and RNA virus replication, virus mutation or any other virus topic.
- Have limited time for studying
- Want a cost effective way to supplement their science learning
- Prefer learning science visually
- Find themselves failing or close to failing their introduction to viruses unit
- Cope with ADD or ADHD
- Want to get ahead in high school biology
- Don't have access to their science teacher outside of class
Why it works:
- Engaging Tutors: We make learning about viruses simple and fun.
- Cost Efficient: For less than 20% of the cost of a private tutor, you'll have unlimited access 24/7.
- Consistent High Quality: Unlike a live biology tutor, these video lessons are thoroughly reviewed.
- Convenient: Imagine a tutor as portable as your laptop, tablet or smartphone. Learn about viruses on the go!
- Learn at Your Pace: You can pause and rewatch lessons as often as you'd like, until you master the material.
- Understand the structures and functions of viruses.
- Take a look at the different shapes a virus can take.
- Describe the life cycle of a virus.
- Lean how viruses are classified.
- Explain how DNA and RNA viruses replicate.
- Discuss the ways in which viruses mutate.
- Differentiate between the lytic and lysogenic cycles of viruses.
- Describe how viruses evade immune systems.
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!
8. 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.
9. 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.
10. Bacteriophage: Definition & Types
A bacteriophage is a virus that exclusively attacks bacteria. Its sole purpose is to use the bacteria for reproduction. In this lesson, learn more about this microscopic invader and take a short quiz at the end.
11. Provirus: Definition & Concept
Even if you didn't know it, you have probably had a virus (or two) within the last three months. This lesson will focus on the provirus, or when viral genetic material is incorporated into your DNA. It will also explain how proviruses are linked to cancer.
12. Antipyretic: Definition & Effect
In this lesson you will learn what an antipyretic is, go over examples of antipyretics, and explore a situation when an antipyretic may be used. You will also learn about the technique's effects on the body.
13. Kell Antigen System
The Kell antigen system is an important blood group system. In this lesson we will discuss blood types, specifically the Kell-positive and Kell-negative blood type, and a disease associated with Kell-positive individuals.
14. Endogenous Antigen: Definition, Example & Processing
An endogenous antigen comes from the body's cells. This lesson will discuss how cells alert the immune system to virus infection or cancer using endogenous antigens.
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