18.1 Studying Viruses and Prokaryotes

INVESTIGATIONModeling VirusesThe structure of a virus actually helps the virus toenter into a host cell and multiply. In this exercise,you will create a model to help understand how avirus attacks a healthy cell.SKILL ModelingBIOLOGYCLASSZONE.COMVIRTUAL LABTesting Antibacterial ProductsDo antibacterial products really kill germs asthey claim? In this interactive lab, you willculture bacteria, and then determine theeffectiveness of different germ-killing agents.PROBLEM How does the shape of a virus relateto how it functions?MATERIALS• research materials (books, scientific journals,Internet)• markers• pipe cleaners• clay• tooth picks• construction paper• white paperPROCEDURE1. In your group, select one of the followingviral illnesses:• chickenpox • mumps • AIDS• common cold • polio • West Nile• influenza • measles • hemorrhagicfever2. Research the structure of the virus that causesthe illness. State the scientific name of the virus(or virus family) that causes the illness.3. Using the provided craft materials, construct amodel of the virus based on the micrographs thatyou find.ANALYZE AND CONCLUDE1. Analyze Look at all the models. What differencesdo you see? How are they similar?2. Apply How does the specific shape of your virusenable it to attack healthy cells?3. Evaluate What characteristics of the virus are notrepresented by your model?ANIMATED BIOLOGYWhat Would You Prescribe?Is an antibiotic always the best medicine?Review patients’ symptoms and diagnoses,then determine if an antibiotic should beused to treat the patients.WEBQUESTModern agriculture uses antibiotics to keeplivestock healthy. Is there a downside togiving livestock antibiotics? Complete thisWebQuest to find out. Explore linksbetween antibiotic resistance and antibioticuse in agriculture.Chapter 18: Viruses and Prokaryotes 567