Period: _____. The Virtual Virus. Directions: Answer the following questions by visiting the following web site below. http://library.thinkquest.org/1...
Directions: Answer the following questions by visiting the following web site below. http://library.thinkquest.org/13373/main/main.htm Click “BEGIN” to enter the web site WHAT ARE THEY? 1. What was Robert Buist doing when he discovered viruses? ____________________________________________ ___________________________________________________________________________________________ 2. Are viruses considered to be alive? _______________________________________________________________ 3. Specifically, why can’t viruses be detected with a light microscope? ___________________________________________________________________________________________ 4. Virus Facts: a. What type of microscope is used to look at viruses? ___________________________________________ b. How much can they magnify an image? ____________________________________________________ c. What are three common shapes of viruses? __________________________________________________ CLICK ‘NEXT’ 5. What are the three main parts of a T-Even virus? ____________________________________________________ 6. Draw and label the typical parts of a virus below.
7. Capsid information: a. What can be found inside the capsid? ______________________________________________________ b. What are the small subunits of a capsid called? _______________________________________________ c. According to this website, what are 30-sided shapes called? ____________________________________ 8. What did the Surveyor space craft do? ____________________________________________________________ 9. What is the function of the tail fibers? ____________________________________________________________ 10. a. Which two nucleic acids can be found in viruses? a. _______________________________________
b. How large are virus chromosomes? b. _________________________________
11. What are two things that virus nucleic acid will do? a. _____________________________________________________________________________________ b. _____________________________________________________________________________________ 12. What does the word LYSE mean? _______________________________________________________________
CLICK ‘NEXT’ 13. Briefly explain what happens in the 4 phases of virus invasion. Put answers in your own words. PHASE 1: __________________________________________________________________________________ PHASE 2: __________________________________________________________________________________ PHASE 3: __________________________________________________________________________________ PHASE 4: __________________________________________________________________________________ ___________________________________________________________________________________________ 14. What is the bodies 1st line of defense against viruses? ________________________________________________ 15. a. What are phagocytes? b. What is their job? a. _____________________________________________________________________________________ b. _____________________________________________________________________________________ 16. What is created when phagocytes build up in a specific area? __________________________________________ 17. Why are antibodies limited in their defense? ___________________________________________________________________________________________ CLICK ‘NEXT’ 18. Which chemicals are called the building blocks of life? _______________________________________________ 19. a. What does virus DNA do once inside cells?
b. What is the newly formed virus proteins used for?
a. _____________________________________________________________________________________ b. _____________________________________________________________________________________ Click ‘INDEX’ and then click ‘AIDS’ 20. What does AIDS do to your body? _______________________________________________________________ ___________________________________________________________________________________________ 21. What are two symptoms that result because of AIDS? ___________________________________________________________________________________________ 22. According to this web site, what are four ways to transmit the HIV virus? a. ______________________________________ b. ______________________________________ c. ______________________________________ d. ______________________________________ 23. a. How long can AIDS remain dormant before symptoms show? b. Why is an AIDS vaccine difficult to create? a.
____________________________________________
b. _____________________________________________________________________________________ 24. Why do some believe AIDS originated in Africa? ___________________________________________________________________________________________ ___________________________________________________________________________________________ Now that you’re finished, go back and look at the “Gallery” of pictures. The “T-Even virus” attacking a cell really creeps me out. That picture shows an exploded cell and the new viruses be released.