L19 - Vesicles Carry Material Between Compartments Alberts...

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Figure 15-8a Essential Cell Biology (© Garland Science 2010) Nuclear Pores Span the Double Membrane of the Nucleus
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Eukaryotic Organelles We can define organelles as intracellular membrane-bounded compartments with specialized functions. Eukaryotic organelles can be grouped into three categories. 1. The Nucleus In a class by itself. 2. Mitochondria and Chloroplasts Derived from endosymbiotic ancestors; still contain their own DNA. Proliferate like bacteria, by growth and division. Don’t exchange membrane with other organelles. Composed primarily of unique components. 3. The Endomembrane System: Endoplasmic Reticulum, Golgi Apparatus, Plasma Membrane, Endosomes, Lysosomes Intimately related; share many components with one another. Internal spaces are topologically equivalent to the outside of the cell. Exchange material by means of transport vesicles. Proliferation mechanisms are still unclear in some cases.
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Size Scales in Cell Biology
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Unformatted text preview: Vesicles Carry Material Between Compartments Alberts et al., Molecular Biology of the Cell Hawaiian Punch Model of the Cell Figure 15-3 Essential Cell Biology ( Garland Science 2010) The Lumen of the ER Is Equivalent to the Outside of the Cell Figure 15-18 Essential Cell Biology ( Garland Science 2010) The Secretory Pathway Starts at the ER What pathway do you think a transmembrane protein follows to reach the eukaryotic plasma membrane? A) It traverses the secretory pathway starting at the ER. B) It is endocytosed from a neighboring cell. C) It is exported from the nucleus through nuclear pores. D) It inserts directly after ribosomes dock at the plasma membrane. Figure 15-27 Essential Cell Biology ( Garland Science 2010) Multiple Classes of Vesicles Form at the TGN Figure 15-35 Essential Cell Biology ( Garland Science 2010) Endocytosed Material is Degraded by Lysosomal Enzymes...
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L19 - Vesicles Carry Material Between Compartments Alberts...

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