BIOL 2170 Chapter Five Notes
BIOL 2170 Chapter Five Notes BIOL 2170
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This 3 page Class Notes was uploaded by chelsea1023 on Tuesday September 8, 2015. The Class Notes belongs to BIOL 2170 at University of Toledo taught by Dr. Deborah Chadee in Summer 2015. Since its upload, it has received 41 views. For similar materials see Fundamentals of Life Science: Biomolecules, cells, and Inheritence in Biology at University of Toledo.
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Date Created: 09/08/15
Chapter Five Organizing Principles LipidsI Membranes an ell Compartments Robert Hooke used corks to discover cells Cell Theory Organisms are all composed of cells 0 Cells are the fundamental unit of life 0 Cells aren t spontaneously created they come from preexisting cells 0 Schleidon Schwann and Virchow are credited with the creation of the cell theory Phospholipids Amphipathic have both polar and nonpolar regions 0 Have a phosphate head and a fatty acid tail Saturated no double bonds are present Unsaturated only one double bond present Polyunsaturated more than one double bond present Cholesterol has an effect on uidity Integral membrane proteins span entire membrane Peripheral membrane proteins are temporary FRAP Fluorescence Recovery After Photobleaching Fluid Mosaic Model lipids and proteins form a 39mosaic in the membrane They move laterally creating a uid motion Diffusion moves from high solute concentration to low solute concentration Passive transport does not require energy Osmosis water moves from areas of high water concentration to areas of low water concentration The Na K pump is an example of an antiporter Primary active transport and secondary active transport require energy to work Hypertonic solution higher concentration outside ces shrink Isotonic solution same inside and out cells are normal Hypotonic solution higher concentration inside ces swell up Very hypotonic solution ces burst Turgor pressure causes movement of water in plant cells imperative to the wellbeing of the plant Proka ryotes No nucleus or organelles o Transcription and translation occur in cytoplasm Small in size 0 High surface area to volume ratio Euka ryotes 0 Has nucleus and organelles Transcription occurs in nucleus translation occurs in cytoplasm 0 Large in size 0 Low surface area to volume ratio Features of an animal cell Nucleus stores genetic info 0 Mitochondria produce ATP 0 Plasma membrane regulates passage of materials into and out of cell Cytoskeleton provides structure to the cell 0 Endoplasmic reticulum protein and lipid synthesis Lysosomes degrade macromolecules Golgi apparatus modify and sort proteins and lipids Nuclear envelope is used to help with passive diffusion Rough endoplasmic reticulum is covered in ribosomes giving it a roughly textured a ppea ra nce
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