Lecture1&2

Lecture1&2 - Lecture 1 Introduction to Cell Biology...

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Lecture 1 09/28/07 Introduction to Cell Biology 1665 Robert Hook discovered cells using a simple microscope -looked at cork chambers, found that they looked like cells monks lived in Cell Theory 1838- foundation of modern biology 3 things: 1.) Cells are smallest functional unit of life 2.) All life forms are made from one or more cells 3.) All cells arise from pre-existing cells -Significance: before Darwin’s theory of evolution and Mendelian genetics -Corollary: chemical composition of all cells is alike Cells are made up of: Sugars Nucleic acids Proteins Lipids Two kinds of cells: Prokaryotes Unicellular Small in size in comparison to eukaryotes Small genomes Cell membranes (some have cell walls) But no membrane bound organelles Examples: Monera: eubacteria; Archaea: archaebacteria Eukaryotes Unicellular or multicellular Larger than prokaryotes Larger genomes as well Has both plasma (cell) membrane and membrane bound organelles
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Lecture1&2 - Lecture 1 Introduction to Cell Biology...

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