150-08cellstructureandfunction[1]

150-08cellstructureandfunction[1] - Foundations of...

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Foundations of Biological Science I (BioSci 150) C Cells… Structure and Function It is the cell that is alive! Therefore. .. study cells to study life.
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Foundations of Biological Science I (BioSci 150) C 1.0 μ M A typical bacterium Prokaryotes lack organelles (internal membrane-bound structures) and have few or no internal membranes
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Foundations of Biological Science I (BioSci 150) C Generalized animal cell Lysosome Nuclear envelope Nucleolus Chromatin Rough endoplasmic reticulum Ribosomes Smooth endoplasmic reticulum Gogli apparatus Peroxisome Mitochondrion Cytoskeletal element Cell membrane (Plasma membrane) Figure 7.6a Centrioles Centrioles are only found in animal cells. 10 μ M
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Foundations of Biological Science I (BioSci 150) C Generalized plant cell Nuclear envelope Nucleolus Chromatin Rough endoplasmic reticulum Ribosomes Smooth endoplasmic reticulum Gogli apparatus Peroxisome Mitochondrion Cytoskeletal element Cell membrane (Plasma membrane) Figure7.6b Central vacuole Chloroplast Cell wall Plasmodesmata - permit cell-cell contact Circled structures are only found in plant cells. 10 μ M
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Foundations of Biological Science I (BioSci 150) C On average, prokaryotic cells are 1/10th the diameter of eukaryotic cells, and 1/1000th the volume . Organelle membranes increase the overall cellular membrane surface area , and serve to divide the cell’s labors. Cell Sizes The membranes of organelles are semi- permeable barriers to the exchange of molecules and particles with the cytoplasm.
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Foundations of Biological Science I (BioSci 150) C In pellet: nuclei mitochondria, chloroplasts, other. .. We study cells by breaking them open, separating their internal parts and asking what they do ribosomes Differential Centrifugation: Fig. 7.20b
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Foundations of Biological Science I (BioSci 150) C Ribosomes: the smallest structure in the cell large subunit small subunit mRNA ...a protein synthesis machine that translates a nucleotide sequence in messenger RNA (mRNA) into an amino acid sequence (a polypeptide) All cells have ‘em! polypeptide eukaryotic and prokaryotic ribosomes are similar
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Foundations of Biological Science I (BioSci 150) C Surface view of nuclear envelope The nucleus: the largest structure in a cell Cross-sectional view of nuclear envelope Nuclear matrix Cytoplasm chromatin in nucleus Inner membrane Outer membrane Cytoplasm chromatin in nucleus Inner membrane Outer membrane Nuclear envelope Nuclear pore Nuclear pore complex
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150-08cellstructureandfunction[1] - Foundations of...

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