12-13_Microbial_Growth___Metabolism_Combo

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Unformatted text preview: Images: Water drop , Fir0002 , flagstaffotos.com.au ; : Cells, full of water versus plasmolyzed , Mnolf, Wiki Microbes & Water: Osmotic Pressure Q: Why can you keep honey on the cupboard for months, even years, without it spoiling? From the Virtual Microbiology Classroom on ScienceProfOnline.com Glycocalyx & Osmotic Pressure Obligate ______________ • Must l ive in a niche of high salt content. • Can grow in an environment up to 30% salt. • If placed within a freshwater environment, they will burst and die. ____________ Halophiles • Can survive and tolerate high salt niches, but do not require them to living. Some bacteria have an additional layer outside of the cell wall called the glycocalyx . One type of glycocalyx is called a _____ ____ • glycoproteins loosely associated with the cell wall. • cause bacteria to adhere to solid surfaces and help prevent the cell from drying out Meet the Microbe! The slime layer of Staphylococcus epidermidis allows it to exist on the salty environment of the skin. Mannitol Salt Photo: Sweat on face of runner; Bibikoff; Mannitol salt agar, T. Port From the Virtual Microbiology Classroom on ScienceProfOnline.com Confused? Here are links to fun resources that further explain cellular respiration: • Microbial Growth & Metabolism Main Page on the Virtual Cell Biology Classroom of Science Prof Online . • Cellular Respiration animation by Jay Phelan, “What is Life? A Guide to Biology”, W. H. Freeman & Co. • Anaerobic Respiration Page by Timothy Paustain, University of Wisconsin, Madison. • Alcohol and Lactate Fermentation by Central Michigan University. • Electron Transport Chain animation from Molecular & Cellular Biology Learning Center. • Food Molecules video from HowStuffWorks, a Discovery company. • “ The Energy ” song by Audiovent. • Diffusion, Osmosis & Active Transport Main Page , Virtual Cell Biology Classroom of Science Prof Online website . • Bacterial growth video and narration, YouTube, Dizzo95. . • “ The Osmosis Song ” music video by Duanie Films. (You must be in PPT slideshow view to click on links.) From the Virtual Microbiology Classroom on ScienceProfOnline.com Homework Assignment  At the end of some lectures, I will give you some type of homework to evaluate your understanding of that day’s material.  This homework will always be open- book.  Today you will be given an activity on the topic of Microbial Metabolism & Selective Media .  If assigned, this homework is due at the at the start of class, next time we meet for lecture. From the Virtual Microbiology Classroom on ScienceProfOnline.com See the ScienceProfOnline Virtual Microbiology Classroom Microbial Metabolism lecture for a printable Word .doc of this assignment. Images: E. coli is happy to grow on MacConkey’s Agar Are microbes intimidating you? Do yourself a favor. Use the… Virtual Microbiology Classroom ( VMC ) ! The VMC is full of resources to help you succeed, including: • practice test questions • review questions • study guides and learning objectives You can access the VMC by going to the Science Prof Online website www.ScienceProfOnline.com Images: , Staphylococcus, Giant Microbes; Prokaryotic cell , Mariana Ruiz...
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