APchapter6notes2 - C hapte 6 note r s A Tour of theC ll e C...

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    Chapter 6 notes A Tour of the Cell
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    Concept 6.1 Light Microscope : visible light is passed  through a specimen and then through  glass lenses - magnification - resolving power
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    Concept 6.1 Electron Microscope : focuses beams of  electrons through the specimen or onto  its surface. - transmission electron microscope  ( TEM ): used to study the internal  ultrastructure of cells - Scanning electron microscope ( SEM ):  used for detailed study of the surface
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    Concept 6.1 Cell Fractionation : take cells apart and  study the fcn. of organelles - use of ultracentrifuges -fig. 7.3
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    Concept 6.2 All cells have several basic features: - have a plasma membrane - cytsol: semifluid  substance that  contains organelles - chromosomes/DNA - ribosomes
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    Concept 6.2 Prokaryotic cell vs. Eukaryotic cell - nucleiod vs. nucleus - eukaryotes are 10X bigger Larger organisms do not have larger cells,  just more cells
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    Concept 6.2 Pili Nucleoid Ribosomes Plasma membrane Cell wall Capsule Flagella Bacterial chromosome (a) A typical rod- shaped bacterium (b) A thin section through the bacterium Bacillus coagulans (TEM) 0.5 µm
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    Concept 6.2 Internal membranes compartmentalize  the fcns. of a eukaryotic cell - membranes consist of a double layer  of phospholipids and other lipids;  attached to the surface are proteins
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APchapter6notes2 - C hapte 6 note r s A Tour of theC ll e C...

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