(1.)

• All Prokaryotes >Achaea and

Bacteria

• Some Protists

• Plants

• Fungi

• Animals

• Most Protists

Under the MicroscopeUnder the MicroscopeUnder the MicroscopeUnder the Microscope

Cell wall

(6.)

Cell wall purposesCell wall purposesCell wall purposesCell wall purposes

ProtectionStrengthShape maintenanceRegulation:

Prevents lysis (bursting)

PlasmodesmataPlasmodesmataPlasmodesmataPlasmodesmata

Narrow channels transport:

WaterNutrients

Director of plant growth and development

Cell Wall StructureCell Wall Structure

Archaea

Polysaccharides

Proteins

Inorganic

Compounds?

Bacteria!Bacteria!•Peptidoglycan

Gram-positive vs. Gram-negative

(2.)

(2.)

CelluloseCellulose

>Protists and Plants<

•Primary Wall•Middle Lamella•Secondary Wall

PLANT CELLS

PLANT CELLS

(3.)

(4.)

• CHITIN

How do cell walls help us?How do cell walls help us?How do cell walls help us?How do cell walls help us?

Paper WoodFiberEnergyShelter

References

1. “Carcassonne castle, France.” Wayfaring Travel Guide. <http://www.wayfaring.info/category/countries/france/page/4/> (accessed

12 March, 2010).2. “Doughnut Varieties.” Krispy Kreme Doughnuts and Coffee.

<http://www.krispykreme.com/varieties.html#> (accessed 13 March, 2010).

3. “Chemistry Review.” Nutrition Resources. <http://nutrition.jbpub.com/resources/chemistryreview9.cfm> (accessed

15 March, 2010).4. “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).

5. "Plasmodesmata." What is a Virus?. Web. 23 Mar 2010. <http://www.mcb.uct.ac.za/tutorial/mcb3011s/MCB3011S%20Virology.htm>.

6. "cell wall." Bhs-66800. Web. 15 Mar 2010. <http://www.freewebs.com/bhs- 66800/cellwallandmembrane.htm>.

7. Hannahs, Greg. "Plasmodesmata." Hannahs Inc., 1997. Web. 15 Mar 2010. <http://biology.kenyon.edu/edwards/project/greg/pd.htm>.

8. 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>.