BIOL125_Ch7 Review - BIOL 125(Microbiology Review Chapter 7...

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BIOL 125 (Microbiology) Review Chapter 7: Elements of Microbial Nutrition, Ecology, and Growth WRITING TO LEARN (Text Page 213) 1a. Differentiate between micronutrients and macronutrients. 1b. Define growth factors, and give examples of them. 2. Name some functions of metallic ions in cells. 3. Compare autotrophs and heterotrophs with respect to the form of carbon-based nutrients they require. 4a. Describe the nutritional strategy for two types of chemoautotrophs (lithotrophs) described in the chapter. 4b. Contrast chemoautotrophs and chemoheterotrophs as to carbon and energy sources and other unique strategies they may have. 4c. What are the main differences between saproboes and parasites? 5. Fill in the following table. Source of Carbon Usual Source of Energy Example Photoautotroph Photoheterotroph Chemoautotroph Chemoheterotroph Saprobe Parasite 6a. Compare and contrast passive and active forms of transport, using examples of what is being transported and the requirements for each. 6b. How are phagocytosis and pinocytosis similar? How are the different? 6c. Explain the differences between facilitated diffusion and group translocation. 7. Compare the effects of isotonic, hypotonic, and hypertonic solutions on an ameba and on a bacterial cell. If a cell lives in a hypotonic environment, what will occur if it is placed in a hypertonic one? Answer for the opposite case as well. 8. Look at the following diagrams and predict in which direction osmosis will take place. Is one of these microbes a halophile? Which one? File: cb14ec0a5bec5a449c9f2b9eb63e50d556dce92a.doc Updated 8/14/09
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