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BI+107+Chapter+6 - Chapter 6 Cell Structure and Organelles...

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Chapter 6 Cell Structure and Organelles
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Microscopy Light Microscopy Electron Microscopy
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Prokaryotes • Bacteria • No internal structures – Cytoplasm – Plasma membrane – Cell wall
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Fig. 6-6 Fimbriae 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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Eukaryotic Cell • Plants, animals, fungi, and protists • Larger than prokaryotic cells • Organisms add more cells rather than continue to increase cell size – Diffusion becomes a problem as size increases. • Cells have many specialized internal structures
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Fig. 6-9a ENDOPLASMIC RETICULUM (ER) Smooth ER Rough ER Flagellum Centrosome CYTOSKELETON: Microfilaments Intermediate filaments Microtubules Microvilli Peroxisome Mitochondrion Lysosome Golgi apparatus Ribosomes Plasma membrane Nuclear envelope Nucleolus Chromatin NUCLEUS
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Fig. 6-9b NUCLEUS Nuclear envelope Nucleolus Chromatin Rough endoplasmic reticulum Smooth endoplasmic reticulum Ribosomes Central vacuole Microfilaments Intermediate filaments Microtubules CYTO-
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