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Chapter_6_fall_2009

Chapter_6_fall_2009 - Chapter 6 A Tour of the Cell Centi...

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Chapter 6 A Tour of the Cell
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Cells & Scale Resolving Power Light microscope ~ 0.2 μ m Electron microscope ~ 2 nm Fig. 6.2 Centimeter (cm) = 1x10 -2 m Millimeter (mm) = 1x10 -3 m Micrometer ( μ m) = 1x10 -6 m Nanometer (nm) = 1x10 -9 m eye Naked eye ~ ______
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Fig. 6.8
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All Cells, both prokaryotic and eukaryotic have: Plasma membrane - the bilayer that separates the outside from the cytoplasm. Ribosomes - protein-RNA structures that make proteins Cytoplasm - _________________ DNA - genetic material
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Prokaryotic cells Prokaryotic cells lack nucleus, Prokaryotic cells lack nucleus, many other organelles many other organelles Prokaryotic cells possess Prokaryotic cells possess ribosomes ribosomes Prokaryotic cells are smaller Prokaryotic cells are smaller Compartmentation in eukaryotic Compartmentation in eukaryotic cells allows greater size cells allows greater size Fig. 6.6
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Figure 6.1 A bovine pulmonary artery endothelial cell stained for mitochondria (red), actin (green), and nuclei (blue) Eukaryotic cell Eukaryotic cell
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Prokaryotic vs Eukaryotic Cells Prokaryotic cells lack nucleus, many other organelles Prokaryotic and eukaryotic cells possess _______ (protein synthesis) Prokaryotic cells are smaller (approximately 1/ 10 th the size of eukaryotic cells)
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Prokaryotic Cell Eukaryotic Cell 1-10 µm in size 10-100 µm in size Single compartment ______________ Circular DNA (cytoplasm) linear DNA (nucleus) Cell wall often a cell wall No internal membranes many internal membranes
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5.4 Animal cell structure Figure 5-42 Fig. 6.9 Fig. 6.9
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Fig. 6.9 Fig. 6.9
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Organelles of the eukaryotic cell Plasma membrane – all eukaryotes the Cytosol - all eukaryotes Ribosomes- all eukaryotes Cell Wall – all eukaryotes except animals the Nucleus - ____________ Mitochondria - _____________ the Endoplasmic Reticulum (ER) - all eukaryotes the Golgi complex - all eukaryotes Peroxisomes - all eukaryotes Lysosomes - animals, fungi some protists Vacuoles - Central vacuole, plants - also protists, fungi Chloroplasts- plants and some protists
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