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Understanding Cell Walls in Different Organisms

Explore the role of cell walls in various organisms, from prokaryotes to fungi and plants, examining their structures, functions, and importance in protecting, strengthening, and maintaining cell shape, with references for further learning.

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Understanding Cell Walls in Different Organisms

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  1. Which Cells Do and Do Not Have Walls? (1.)

  2. DoDon’t • All Prokaryotes >Achaea and Bacteria • Some Protists • Plants • Fungi • Animals • Most Protists

  3. Under the Microscope Cell wall (6.)

  4. Cell wall purposes Protection Strength Shape maintenance Regulation: Prevents lysis (bursting)

  5. Plasmodesmata • Narrow channels transport: • Water • Nutrients • Director of plant growth and development

  6. Cell Wall Structure

  7. Archaea Inorganic Compounds? Proteins Diversity Polysaccharides

  8. Bacteria! Peptidoglycan Gram-positive vs. Gram-negative (2.) (2.)

  9. Cellulose PLANT CELLS • Primary Wall • Middle Lamella • Secondary Wall >Protists and Plants< (3.) (4.)

  10. CHITIN Fungi

  11. How do cell walls help us? • Paper • Wood • Fiber • Energy • Shelter

  12. References • “Carcassonne castle, France.” Wayfaring Travel Guide. <http://www.wayfaring.info/category/countries/france/page/4/> (accessed 12 March, 2010). • “Doughnut Varieties.” KrispyKreme Doughnuts and Coffee. <http://www.krispykreme.com/varieties.html#> (accessed 13 March, 2010). • “Chemistry Review.” Nutrition Resources. <http://nutrition.jbpub.com/resources/chemistryreview9.cfm> (accessed 15 March, 2010). • “22.5 The Dynamic Plant Cell Wall.” Molecular Cell Biology. <http://www.ncbi.nlm.nih.gov/bookshelf/br.fcgi?book=mcb &part=A6590> (accessed 15 March 2010). • "Plasmodesmata." What is a Virus?. Web. 23 Mar 2010. <http://www.mcb.uct.ac.za/tutorial/mcb3011s/MCB3011S%20Virology.htm>. • "cell wall." Bhs-66800. Web. 15 Mar 2010. <http://www.freewebs.com/bhs- 66800/cellwallandmembrane.htm>. • Hannahs, Greg. "Plasmodesmata." Hannahs Inc., 1997. Web. 15 Mar 2010. <http://biology.kenyon.edu/edwards/project/greg/pd.htm>. • Saupe, Dr. Stephen. "Plant Physiology." Cell Walls-Structure and Function. SG Saupe, 06 Feb 2009. Web. 23 Mar 2010. <http://employees.csbsju.edu/SSAUPE/biol327/Lecture/cell-wall.htm>.

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