Name ______Date ______Period ____

Virus Web Worksheet

Go to website How are viruses like hijackers? ______

Why are viruses hard to treat? ______

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Go to How big is a virus?

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Why are viruses NOT alive? ______

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What happens when a virus particle attacks a cell? ______

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What will the infected cell do? ______

Go to website How do viruses reproduce?

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What happens to the host cell when a virus replicates inside it? ______

What do the newly made virus particles do? ______

What 2 components do all viruses contain? ______

What are the steps in the virus life cycle? ______

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Go to What happens when a virus comes in contact with a host cell? ______

What happens during the lysogenic phase? ______

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What happens in the lytic phase? ______

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What are some diseases caused by a virus? ______

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Go to website: Click on "Information", then click on “What is a microbe”? ______

Click on “viruses”. Why is it debatable whether viruses are living organisms? ______

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Why are most viruses known? ______

Go to . Copy the definition of the “Lytic Cycle” from the first screen : ______

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Play the animation and write down the 6 steps in a Lytic infection:

1)______

2)______

3)______

4)______

5)______

6)______

Go to website and watch the animation about viral infection. Explain the difference between Injection and Endocytosis: ______

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Go to to watch the Lysogeny video. Copy the definition of “Lysogeny” from the first slide: ______

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Play the animation and write the 4 steps in a Lysogenic infection:

1)______

2)______

3)______

4)______

How is Lysogeny different from lytic cycle? ______

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Go to website watch an animation about how the Polio virus enters and replicates inside a person. Summarize what happens: ______

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Go to website to see how much you know about the difference between Viruses and Bacteria. Drag and drop the statements. Once you have all ten answers correct, write them here:

Viruses / Bacteria

Go to website to view a video about how the flu virus attacks and a historic view of flu epidemics. How many people died from the flu pandemic in 1918? ______

What is the key of how the new swine flu gets into a human cell? ______

What does a virus particle do once it is made and released? ______

Why is the body’s immune response to the virus dangerous? ______

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What happens inside a pig? ______

What does our “jet-setting” lifestyle cause? ______

Go to website What does the word “Prion” stand for? ______

What is unique about prions? ______

Go to website . What body system do Prion diseases affect? ______

What are the symptoms of Prion diseases? ______

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How many cases of CJD (the human form) occur each year in the USA? ______

What happens when the normal Prion protein (PrPc) is converted into the abnormal protein?

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Go to website for a video about prions.

Go to website What are viroids?

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How are viroids different than viruses? ______

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Go to website to compare viroid and virus