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Copyright Notice!
This PowerPoint slide set is copyrighted by Ross Koning
and is thereby preserved for all to use from
plantphys.info for as long as that website is available.
Images lacking photo credits are mine and, as long as
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permission.
Cell Structure
Prokaryotic
before nucleus
Eukaryotic
true nucleus
Comparing Cell Sizes
Mycoplasma 0.3-0.8 µm
E. coli 1x2 µm
Cyanobacteria 10 µm diam
Plant Cell 30x75 µm
Obviously eukaryotic
Nucleus present
Mitochondrion  Bacterium
Chloroplast  Cyanobacterium
Endosymbiosis: Eukaryotes are Chimeras!
http://content.answers.com/main/content/img/scitech/HSmatthi.jpg
http://home.tiscalinet.ch/biografien/images/schwann.jpg
Cell Theory
1839
Theodor Schwann
Prussian Zoologist
1810-1882
Matthias Schleiden
German Botanist
1804-1881
1. All living organisms consist of one or more cells.
2. Some organisms are unicellular, so cells are the fundamental unit of life.
3. New cells come from pre-existing cells by cell division.
We can now add:
4. Cells must show all the properties of life.
5. All cells are basically similar in chemical and structural composition.
Eukaryotic Cell Structure
Chloroplast
-photosynthesis
Middle Lamella-pectin glue
Cell Wall-cellulose+protein
Cell Membrane-phospholipid
-transport proteins
Cytosol-enzymes for
-fermentation
-glycolysis
70S ribosomes
naked, circular DNA
Mitochondria
-respiration
70S ribosomes
naked, circular DNA
Vacuoletoxic waste
processing
Vesicles
-import/export package
Golgi Apparatus
-sorting
-packaging
Nucleus-DNA linear
histone bound
-transcription
-replication
Endoplasmic
Reticulum
-internal transport
80S Ribosomes
-protein synthesis
-translation
Other eukaryotic
organelles have
been omitted here!