worksheet 3

worksheet 3 - Bild1: The Cell Fridays 10am Centr 217A TA:...

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Bild1: The Cell TA: Xu Yu Zeng Office Hours Fridays 10am Centr 217A xyzeng@ucsd.edu Mon. Tap Ex 11am Worksheet 3 Introduction to the Cell: All living things are compose of cells and all cells originate from pre-existing cells Cells need to be small to keep a high SURFACE / VOLUME ratio If too large, cells could not move nutrients or waste IN / OUT fast enough Light microscopy: 3 ways to study the cell Fluorescence: Shows the location of molecules in the cell by tagging them with fluorescent dyes or antibodies Phase-contrast: Enhances contrast in cells by amplifying variations in density Confocal: Uses lasers and special optics to optically section fluorescently-stained cells Prokaryotes: “before nucleus” They are usually bacteria, thus they are unicellular They don’t have no nucleus or organelles Eukaryotes: “true nucleus” Can be unicellular (yeast) or multicellular (animal and plant) Contains organelles, which are compartmentalized sites to regulate and perform specific functions Prokaryotic Cell Eukaryotic Cell Ribosome Chorosome
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worksheet 3 - Bild1: The Cell Fridays 10am Centr 217A TA:...

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