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Download Bi 11 - Review -viruses and bacteria
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Bi 11 Review VIRUSES AND BACTERIA 1. What are the differences between viruses and bacteria? ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ Information source: _______________________________________________________ 2. Of viruses and bacteria, which is most like a vampire when they are outside of a host? Explain. (A vampire is neither living nor dead) a) viruses and bacteria b) viruses c) bacteria ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ Information source: _______________________________________________________ 3. When a virus gets into a cell, it is like the cell is taken hostage. What does the hostage taker, the virus, do within and to the cell? (There are two possibilities). ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ Information source: _______________________________________________________ 4. How does the body stop a virus from continuing to multiply? ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ Information source: _______________________________________________________ 5. How does a vaccine work against viruses? ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ Information source: _______________________________________________________ 6. What are the common ways viruses are transmitted to others? ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ Information source: _______________________________________________________ 7. A cold is a viral infection. When you get a cold, when are you the most contagious? ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ Information source: _______________________________________________________ 8. What does the AIDS virus do to cells? ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ Information source: _______________________________________________________ 9. List at least three types of viral infections and some of their symptoms: ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ Information source: _______________________________________________________ Which ones are you most likely to get? _______________________________________ 10. Most bacteria are not harmful and are even beneficial and necessary for the proper functioning in our bodies. What is the scientific name of the bacterium that "lives in our intestines and seems to be essential for proper digestion and the elimination of waste?" (Modern Biology, p. 200) __________________________________________________ 11. List at least two other ways bacteria are useful. ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ Information source: _______________________________________________________ 12. "Harmful bacteria prevent the body from functioning properly by destroying healthy cells.... " (World Book, 2000, p. 20) How does the body protect itself against harmful bacteria? ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ Information source: _______________________________________________________ 13. New strains of bacteria have become resistant to antibiotics. Briefly explain how this happens. ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ Information source: _______________________________________________________ 14. Although mucus is not everyone's favourite fluid, it has a useful function. What is it? ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ Information source: _______________________________________________________ 15. What makes mucus green when you have a cold? Is the presence of green mucus a positive sign? Explain. ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ Information source: _______________________________________________________ 16. Antibiotics can only cure ______________________________ infections. (Bacterial or viral - choose one) 17. Why does your body temperature go up (i.e. produce a fever), when you are sick? ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ Information source: _______________________________________________________ 18. List at least three types of bacterial infections and some of their symptoms: ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ Information source: _______________________________________________________ Which one are you most likely to get? _________________________________________ 19. You cannot get the same cold twice. Why? ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ Information source: _______________________________________________________
