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Name: Biology 11 Bacteria WebQuest Visit the following websites and watch the videos to find out more about bacteria. This activity will be focusing mainly on the beneficial role that bacteria play and antibiotic resistance. Type your answers into this worksheet, save it with your names as the file name, and email it to me as an attachment (use the paperclip icon). “Bacteria: The Good, The Bad, The Kinda Gross” https://www.youtube.com/watch?v=kxM_9DL2GYw What does streptococcus produce that makes us sick? What do antibiotics target in order to be effective against bacteria? There are more bacteria cells than human cells in your body. True or False? What are three possible side effects of taking antibiotics? “Pickles, Probiotics & Why Rotten Food is Good for You” https://www.youtube.com/watch?v=1vwfGxVWYNk What are four beneficial roles that bacteria perform for the human body? Fermentation is a type of aerobic OR anaerobic respiration. (Underline the correct choice). Bacteria that use fermentation convert sugars into: What is the “star bacteria” of your intestines? Why are fermented foods easier to digest than pickled foods? How many bacterial cells do you have in your body? “Microbiology- Bacteria Antibiotic Resistance” https://www.youtube.com/watch?v=057phDG4mKU Describe the cell wall structure of gram-positive bacteria. Describe the cell wall structure of gram-negative bacteria. What type of molecules does penicillin target? Is penicillin more effective against gram-positive bacteria or gramnegative bacteria? Why? What part of the bacteria helps it become resistant to antibiotics? Antibiotic resistance genes can have three possible results: Bacteria can acquire the antibiotic resistance gene in two ways: vertical transfer and horizontal transfer. List the ways this happens (you do not need to describe each process). “Bacteria: Life History & Ecology” http://www.ucmp.berkeley.edu/bacteria/bacterialh.html The ecosystem, both on land and in the water, depends heavily upon the activity of bacteria. The cycling of nutrients such as carbon, nitrogen and sulfur is completed by bacteria’s non-stop work. Explain the role of each of the following and how bacteria are involved in each: Decomposition Nitrogen Fixation Denitrification What type of organism relies on nitrogen in soil for their health and growth? “Microbe Zoo” http://commtechlab.msu.edu/sites/dlc-me/zoo/ Visit Dirtland. Select Root Cellar. Scroll down to “Nitrogen Fixers.” Explain how the bacteria Rhizobia helps plants make proteins. What does Rhizobia get in return? Go to the Animal Pavilion. Select Poo Corner. Briefly discuss how waste is treated in septic tanks and in aerobic sewage treatment plants. Go to the Snack Bar. Discuss the role of bacteria in three different foods you eat (please select foods that ferment using bacteria, not yeast). Name the bacteria responsible for each.
