The fluid mosaic model of the cell membrane. What is the fluid mosaic model? The fluid mosaic model is a model conceived by S.J. Singer and Garth Nicolson in 1972 to describe the structural features of biological membranes. The membrane is described to be fluid because of its hydrophobic integral components such as lipids and membrane proteins that move laterally or sideways throughout the membrane. That means the membrane is not solid‚ but more like a ’fluid’. The membrane is depicted as mosaic
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light microscope when you want to see the cell in the act of moving or dividing. 2. Prokaryotic cells don’t have organelles like eukaryotic cells do. Eukaryotic cells contain its DNA within its nucleus‚ while prokaryotic cells keep it within the nucleoid. Prokaryotic cells are also more minute than the eukaryotic cells. Also although they both contain ribosomes‚ they are composed differently. 3. The central vacuole (takes in water and chemicals)‚ cell wall (allows the plant to be strong enough to
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The prokaryotic cell precedes any forms of Bacteria‚ Archaea‚ and eventually Eukaryotes by approximately two billion years. This cell was the original life form on the planet and represents the smallest and least complex of all organisms. Through the process of mutation and adaptation they were able to survive to evolve into our modern day Bacteria‚ Archaea‚ Fungi and Protists. These post organisms have benefited from their early ancestor‚ by way of Endosymbiosis. Intricate protest and fungi are
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with others inside their boarders‚ whether it be a house or country. In the poem “Mending Wall” by Robert Frost‚ he introduces two neighbors who have a wall separating their farms. One neighbor is the speaker‚ who has apple trees‚ and the other neighbor is the narrator‚ who has pine trees. The setting takes place in a New England countryside during springtime. The situation of the poem begins with a crumbled wall between two neighbors where they meet every year to repair the damages done. During this
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2. Draw and completely label a cell membrane. [pic] 4. List and briefly discuss the 5 components of cellular membranes. 1. Phospholipids layer- 2 layers ‚ polar and non polar ‚ polar facing the extracellular fluid and cytoplasm 2. Transmembrane proteins-integral membrane proteins are proteins that expand the membrane 3. Interior protein network-peripheral proteins are in the interior side of the membrane 4. Cell surface markers are glycolipids‚ carbohydrates/lipid
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The wolf of Wall Street The background of the story The film is talking about Jordan Belfort (Leonard DiCaprio starred) ran a stock brokerage firm called Stratton Oakmont that defrauded investors in 90s‚ this is one of the most famous business fraud scandals in wall street and he is known as “Wolf of Wall Street”. The company running the business by buying penny stocks with some secrets accounts‚ they hired salesmen to do the cold calls and persuaded them to buy their stocks that could make many
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Meiosis was discovered and described for the first time in sea urchin eggs in 1876 by the German biologist Oscar Hertwig. It was described again in 1883‚ at the level of chromosomes‚ by the Belgian zoologist Edouard Van Beneden‚ in Ascaris worms’ eggs. The significance of meiosis for reproduction and inheritance‚ however‚ was described only in 1890 by German biologist August Weismann‚ who noted that two cell divisions were necessary to transform one diploid cell into four haploid cells if the number
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Mending Wall Commentary Robert Frost’s Narrative poem‚ “Mending Wall” is a light-hearted yet tense depiction of opposing views that brings together two different people. Written in blank verse with simple structure and strewn with images alluding to myths and human history‚ this poem reveals the men’s customs and furthermore the never ending ritual of man‚ which guides the reader to conclude that In this poem Robert Frost does make an allusion to the famous Greek myth of Sisyphus. For those of
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Rise of the Berlin Wall David Wolfswinkel Gr.9e2 Table of Contents: Introduction to the Berlin Wall Germany after World War 2 The Eastern Bloc Erection of the Inner German Boarder The Berlin Loophole The Brain Drain Construction Begins‚ 1961 Immediate Effects of the Wall Conclusion‚ "Mr. Gorbachev‚ tear down this wall." Bibliography p.1 p.1 p.2 p.2 p.3 p.3 p.4 p.5 P.5 p.6 The Berlin Wall Introduction to the Berlin Wall The Berlin Wall was a physical barrier built by the German Democratic
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FALL OF THE BERLIN WALL 1988-1989 A RESEARCH PAPER SUBMITTED FOR DEPARTMENT’S NAME Student’s name Class Professor’s name Date THE FALL OF THE BERLIN WALL 1988-1989 Investigating the history of Germany‚ I should admit that the period from 1988 till 1989 was a turning-point. On the 9th of November‚ 1989 the Berlin Wall‚ which separated East Germany and West Germany‚ fell. So‚ these two parts of the country combined again. There were a lot of people who were waiting for
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