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Conceptual questions at viruses that is virus alive or not. Virus are small infectious particles.
Typology: Exercises
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Name ____________________________________ Date ________________ Period ____ Virus Web Worksheet Go to website http://www.nlm.nih.gov/medlineplus/viralinfections.html How are viruses like hijackers? _________________________________________________________________ Why are viruses hard to treat? _________________________________________________
Go to http://www.news-medical.net/health/What-is-a-Virus.aspx How big is a virus?
Why are viruses NOT alive? ___________________________________________________
What happens when a virus particle attacks a cell? _________________________________
What will the infected cell do? __________________________________________________ Go to website http://www.ks.uiuc.edu/Research/STMV/ How do viruses reproduce?
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? _________________________________________
Go to http://www.ucmp.berkeley.edu/alllife/virus.html What happens when a virus comes in contact with a host cell? ______________________________________________________ What happens during the lysogenic phase? _______________________________________
What happens in the lytic phase? _______________________________________________
What are some diseases caused by a virus? ______________________________________
Go to website: http://www.commtechlab.msu.edu/sites/dlc-me/zoo/ Click on "Information", then click on “What is a microbe”? ______________________________________________ Click on “viruses”. Why is it debatable whether viruses are living organisms? _____________
Why are most viruses known? _________________________________________________
Go to http://www.courses.fas.harvard.edu/~biotext/animations/lyticcycle.html. Copy the definition of the “Lytic Cycle” from the first screen : _________________________________
Play the animation and write down the 6 steps in a Lytic infection:
Go to website http://www.courses.fas.harvard.edu/~biotext/animations/viralinfection.html and watch the animation about viral infection. Explain the difference between Injection and Endocytosis: _______________________________________________________________
Go to http://www.courses.fas.harvard.edu/~biotext/animations/lysogeny.html to watch the Lysogeny video. Copy the definition of “Lysogeny” from the first slide: __________________
Play the animation and write the 4 steps in a Lysogenic infection:
How is Lysogeny different from lytic cycle? ________________________________________
Go to website http://amhistory.si.edu/polio/activities/lifecycle/index.htm to watch an animation about how the Polio virus enters and replicates inside a person. Summarize what happens: