1. Diana Carvajal August 2014 http://t2.gstatic.com/images?q=tbn:ANd9GcTB6YQWcF9pYillWplUSjw LeaYe9b6DpWQa5EnlY_oZHbJGcx_00w http://explore.ecb.org/videos/VLC_file?TYPE=Image&P1=2080&REFER ER=OTHER Developments in scientific research follow improvements in apparatus—the invention of electron microscopes led to greater understanding of cell structure.

2. Microscopes! Electron microscopes have a much higher resolution than light microscopes. https://www.classzone.com/books/ml_science_share/vis_sim/chm05_pg19_microscope/chm05_pg19_microscope.swf http://web.biosci.utexas.edu/psaxena/MicrobiologyAnimations/Animations/Microscopy/micro_microscopy.swf

3. 1. Molecules (1nm). 2. Cell membrane thickness (10nm). 3. Virus (100nm). 4. Bacteria (1um). 5. Organelles (less 10um). 6. Cells (<100 um). 7. Generally plant cells are larger than animal cells. http://intranet.canacad.ac.jp:3445/BiologyIBHL1/550 nm = nanometer μm = micrometer

4. Absence of organelles. There is no true nucleus. Some bacteria have flagellum.

5. Ultrastructure of E. coli. Drawing of the ultrastructure of prokaryotic cells based on electron micrographs Prokaryotes have a simple cell structure without compartmentalization. (With naked DNA) 70S

6. What are the functions of these prokaryotic cell parts?

8. Binary fission: Asexual method of reproduction. The cells produced are genetically identical (clones). Prokaryotes divide by binary fission

9. Drawing of the ultrastructure of eukaryotic cells based on electron micrographs. 1 2 3 4 5 6 7 8 Eukaryotes have a compartmentalized cell structure. Eukaryotic cell

11. Which structures can you identify in this false- coloured TEM (transmission electron microscopy) image?

12. Electron micrographs of liver cells.

13. http://www.sciencephoto.com/media/214698/enlarge Magnification x47,500 at 10X8 cm size.

14. http://www.sciencephoto.com/media/214698/enlarge Magnification x47,500 at 10X8 cm size. Nucleus Nuclear membrane mitochondria endoplasmic reticulum (ER) ribosomes Electron micrographs of liver cells.

15. http://www.ucmp.berkeley.edu/alllife/eukaryotamm.html

16. What are the differences between prokaryotic and eukaryotic cells? Comparison of prokaryotic and eukaryotic cells

18. Identify structures in electron micrographs of E. coli