341lecture01sept9sakai

341lecture01sept9sakai - BIO 341 Principles of Cell Biology...

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BIO 341 Principles of Cell Biology September 9, 2009 Please pick up a syllabus and a slide handout Today: Comparison of eucaryotic and procaryotic cells Begin chapter 2: types of bonds Figure 1-33 a mitochondrion A. Cross section seen in the electron microscope B. 3-D structure C. Eucaryotic cell with mitochondrial interior space in red
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All organisms are composed of cells Universal features of all cells All cells come from pre-existing cells Cells are the minimum functional unit of life All cells are surrounded by a plasma membrane containing transport proteins All cells require free energy to drive reactions and create order All cells store their hereditary information in DNA (total information = genome ) All cells transcribe DNA into RNA Messenger RNA (mRNA) is translated into protein on ribosomes in all cells All cells use proteins to catalyze reactions = enzymes . Some RNA molecules also act as catalysts Figure 1-4 common features of gene expression in all cells
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There are two fundamental types of cells: see figure 1-18 and 1-30 Eucaryotic cells: (true nucleus) contain nucleus surrounded by two membranes 10-1000 μ m diameter Contain organelles surrounded by internal membranes
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341lecture01sept9sakai - BIO 341 Principles of Cell Biology...

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