Chapter 6: A Tour of the Cell Cell fractionation – cells are taken apart using a centrifuge (differential centrifugation) and separated into their sub cellular structures Point of Difference | Eukaryotic | Prokaryotic | Shape/Size | Larger | Smaller | Complexity | Membrane bounded organelles | No membrane bound organelles | Nucleus | Bounded membrane with DNA | DNA in a region (nucleoid) | Kingdom | Plants‚ animals‚ fungi‚ protists | Bacteria and archaea | Reproduction | Sexual reproduction
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Cells are some of the smallest organisms around. All living things consist of cells‚ and yet they are invisible to the naked eye. Cells are the basic structural and functional units of life. Cells are made up of many different parts which allow them to function properly. All cells are separated from their surrounding by a cell membrane. The cell membrane regulates what enters and leaves the cell and also aids in the protection and support of the cell. A cell membrane
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for the description of all biological membranes • Transmembrane segments of membrane proteins anchor membrane proteins in the lipid bilayer. • A ganglioside is not a phospholipid. • Thin-layer chromatography separates lipids based on hydrophobicity. • Unsaturated fatty acids have double bonds and increased membrane fluidity. • Cholesterol increases fluidity at low temperatures and decreases fluidity at high temperatures. • Ankyrin is a peripheral membrane protein found in erythrocytes. Therefore
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Procedure 2: DNA Extraction from Cheek Cells Materials: Water‚ Clear Dish Soap‚ Table Salt‚ Isopropyl Alcohol (70%) or Ethanol‚ Food Coloring 1. To 200 Ml drinking water add two teaspoons of salt 2. Gargle the salt water for 1 minute. 3. Spit the gargled water into a beaker (or new cup). Now your cheek cells are suspended in the salt water. 4. Gently stir the salt water with one drop of soap (try to avoid air bubbles) 5. In a separate beaker (or cup)‚ mix 20 ml isopropyl alcohol and 1-3 drops
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Cell Structure and Function: Tonicity and pH Justin HeshizerBIOL 1107K (80561) 50 Experiment Number 5 10/02/14 Margaret E. Vorndam‚ M.S. Version 42-0038-00-01 Lab Report Assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions‚ diagrams if needed‚ and data tables that should be addressed in a
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Site Plan | I. Neurons/nerve cells A neuron is a cell specialized to conduct electrochemical impulses called nerve impulses or action potentials. Neuron is the main cellular component of the nervous system‚ a specialized type of cell that integrates electrochemical activity of the other neurons that are connected to it and that propagates that integrated activity to other neurons. They are the basic information processing structures in the CNS.
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advantages of road transport in comparison to other modes of transport. 1. Less capital quality:- Road transport required much less capital investment as compared to other modes of transport such as railways and air transport. 2. Door to door services: - The outstanding advantage of road transport is that it provides door to door or warehouse to warehouse services. 8. Saving in packing cost: - As compared to other modes of transport‚ the process of packing in motor transport is less complicated
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Cell Structure - Cell Organelles 1. What is cell theory? Cell theory asserts that the cell is the constituent unit of living beings. Before the discovery of the cell‚ it was not recognized that living beings were made of building blocks like cells. The cell theory is one of the basic theories of Biology. 2. Are there living beings without cells? Viruses are considered the only living beings that do not have cells. Viruses are constituted by genetic material (DNA or RNA) enwrapped by a protein
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Traffic Congestion Traffic congestion is a condition on road networks that occurs as use increases‚ and is characterized by slower speeds‚ longer trip times‚ and increased vehicular queuing. The most common example is the physical use of roads by vehicles. When the traffic demand is great enough that the interaction between vehicles slows the speed of the traffic stream‚ this will results in some congestion. As demand approaches the capacity of a road (or of the intersections along the road)‚
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What are your views on the development of public transport infrastructure in enhancing the future economic growth and development of the 2 countries? This issue shall be discussed together in context of 2 case studies‚ China (Article A) and Malaysia (Article B). Economic growth and development of a country go hand in hand; development of a country is a process of change and the growth of the economy will inevitably bring about urban change in an environment which aims to improve the standard and
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