Bio Notes- Week of Sept 14
Bio Notes- Week of Sept 14 BIOL 160 - 018
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BIOL 160 - 018
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This 3 page Class Notes was uploaded by Caroline Emery on Thursday September 17, 2015. The Class Notes belongs to BIOL 160 - 018 at University of Tennessee - Knoxville taught by John W Koontz in Fall 2015. Since its upload, it has received 26 views. For similar materials see Cellular and Molecular Biology in Biology at University of Tennessee - Knoxville.
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Date Created: 09/17/15
917 Kinds of Cells Prokaryotes Bacteria and Archaea o No nucleus has a nucleoid Single circular chromosome supercoiled in the nucleoid o Plasmids Carry a bene cial gene like drug resistance outside the chromosome 0 Plasma membrane 0 Ribosomes for protein synthesis 0 Stiff cell wall Layer outside made of glycolipids o Photosynthetic membranes 0 Some can have organelles Function depends on the cell 0 Cytoskeleton on long thin proteins 0 Can have agella for motility Eukaryotes about 10x larger Animal and Plant cells 0 Most are multicellular can be unicellular o Difficult to diffuse all the way across large cells organelles solve this problem Compartmentalization allows separation on incompatible chemical reactions and increased reaction efficiency Nucleus Large and highly organized Surrounded by double membrane nuclear envelope 0 Two membranes consists of lipid bilayer continuous with ER 0 Inside surface linked to brous proteins in lattice like sheets of nuclear lamina Stiffens membrane for structure and shape Chromosomal attachment points Distinct nucleolus o Ribosomal RNA synthesis 0 Information storage and processing 0 Contains chromosomes Endomembrane system Smooth ER Rough ER Golgi Complex Mitochondria Chloroplast Ribosomes No membranes not considered an organelle Large and small subunits 0 Not usually attached 0 Contain RNA and proteins 0 Can be attached to Rough ER or in cytosol Synthesis proteins Dynamic Cells 0 Body uses 10 million ATPsecond Enzymes catalyze gt25000 rxnsecond Membrane phospholipid travel across organelle or cell in gt1min All mitochondria replaced every 10 days Fluid plasma membrane s composition changes constantly
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