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Anatomy of Prokaryotes and Eukaryotes Prokaryotic Cell Structure Cell size, shapes, and arrangements Parts of a Prokaryotic Cell Glycocalyx: slime layer or capsule Fimbriae and sex pilus, flagella Cell wall and plasma membrane (g+, g-, mycobacteria, archaebacteria) Plasma membrane and material transport; osmosis Nuclear Area (Nucleoid), Plasmids, Ribosomes Endospores Eukaryotic Cell Structure Cytoplasm (open streets and city squares) Nucleus (library) Ribosomes (construction factories) Internal membrane System: ER, Golgi, Lysosomes Mitochondria (power station) Chloroplasts (food synthesis factory) Cytoskeleton (pulling ropes,& lumber)
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Plasma or Cell Membrane Figure 4.14a
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Types of Transport Across a Selectively Permeable Cell Membrane
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Osmosis and Water Balance in Cells Osmosis is the passive transport of water across a selectively permeable membrane. Water moves across a membrane from high concentration (high purity) to low concentration (low purity)
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Figure 4.18c-e Osmosis: Water Moving From High Purity to Low Purity Bacterial growth media is made to be isotonic with cells ( ~ 1% dissolved substances) (outside)
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Anatomy of Prokaryotes and Eukaryotes Prokaryotic Cell Structure Cell size, shapes, and arrangements Parts of a Prokaryotic Cell Glycocalyx: slime layer or capsule Fimbriae and sex pilus, flagella Cell wall and plasma membrane (g+, g-, mycobacteria, archaebacteria) Plasma membrane and material transport; osmosis Nuclear Area (Nucleoid), Plasmids, Ribosomes Endospores, Cytoskeleton Eukaryotic Cell Structure Cytoplasm (open streets and city squares) Nucleus (library) Ribosomes (construction factories) Internal membrane System: ER, Golgi, Lysosomes Mitochondria (power station) Chloroplasts (food synthesis factory) Cytoskeleton (pulling ropes,& lumber)
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Inclusions and Other Membranes Figure 4.6a Inclusion Nucleoid (Nuclear Area) Plasmid
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Ribosomes Figure 4.19 Ribosomes from eukaryotes are larger and constructed differently
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Metachromatic granules (phosophate) Polysaccharide granules Lipid inclusions Sulfur granules Carboxysomes Thylakoids/photsynthetic membranes Gas vacuoles Magnetosomes Intracellular Membranes and Inclusions
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Figure 4.21a Endospore Formation Endospores are heat-resistant, UV resistant, and chemically resistant
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Bacterial Cell Walls Include Scaffolding Proteins (Cytoskeleton) Proteins similar to actin in eukaryotes help in expanding the peptidoglycan during bacterial growth by acting as scaffolds
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Anatomy of Prokaryotes and Eukaryotes II Prokaryotic Cell Structure Cell size, shapes, and arrangements Parts of a Prokaryotic Cell Glycocalyx: slime layer or capsule Fimbriae and sex pilus, flagella Cell wall and plasma membrane (g+, g-, mycobacteria, archaebacteria) Plasma membrane and material transport; osmosis Nuclear Area (Nucleoid), Plasmids, Ribosomes Endospores, Cytoskeleton Eukaryotic Cell Structure Cytoplasm (open streets and city squares) Nucleus (library) Ribosomes (construction factories) Internal membrane System: ER, Golgi, Lysosomes (Construction & shipping) Mitochondria (power station) Chloroplasts (food synthesis factory) Cytoskeleton (pulling ropes,& lumber)
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Comparison of Prokaryotic and Eukaryotic Cells
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Greater Size, Complexity, and Nucleus in Eukaryotes Figure 4.22b
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Figure 4.21a Eukaryotic Cells:Protists, Plants, Animals, & Fungi Cell wall (if present)
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Anatomy of Prokaryotes and Eukaryotes Prokaryotic Cell Structure Cell size, shapes, and arrangements Parts of a Prokaryotic Cell Glycocalyx: slime layer or capsule Fimbriae and sex pilus, flagella Cell wall and plasma membrane (g+, g-, mycobacteria, archaebacteria) Plasma membrane and material transport; osmosis Nuclear Area (Nucleoid), Plasmids, Ribosomes Endospores Eukaryotic Cell Structure Cytoplasm (open streets and city squares) Nucleus (library) Ribosomes (construction factories) Internal membrane System: ER, Golgi, Lysosomes Mitochondria (power station) Chloroplasts (food synthesis factory) Cytoskeleton (pulling ropes,& lumber)
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