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Cell Structure
An hypothesis originally proposed that all organisms are composed of cells. Over time, the concept has withstood scientific confirmation to now encompass 3 principles in the Cell Theory:
1) All organisms are composed of 1 or more cells and the life process of metabolism and heredity occur within those cells
2) Cells are the basic units of organization of all organisms
3) Cells arise by the division of pre-existing cells
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A generalized Eukaryotic cell
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Structure of an animal cell
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Structure of a plant cell
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A generalized Prokaryotic cell
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Relative size ranges
Most cells are microscopic, although vertebrate egg cells are large enough to be seen with the naked eye.
Prokaryotic cells are ~ 1 – 10 um in length
Eukaryotic cells are ~ 10 – 100 um in size
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Surface area per unit volumeSmall cells vs. Large cells
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Nuclear ultrastructure
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Supercoiling of DNA w/i chromosome
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Endoplasmic reticulum
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Protein Synthesis along the ER
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The Golgi apparatus
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How proteins are processed
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Lysosome function
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Ribosome structure
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Mitochondrion structure
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Chloroplast structure
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Representative animal cell
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Representative Plant cell
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Structures of the Cytoskeleton
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Microfilament
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Microtubule structure
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Intermediate filament
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Centrioles
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Molecular motor
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Flagellum and cilium
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The Central Vacuole of Plant cells
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Primary and secondary plant cell walls
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Glycocalyx of eukaryotic cell