Lipids and Phospholipids The main role of phospholipids is that they can form lipid bilayers. It is an amphipathic molecule. The head which is hydrophilic contains a group of phosphate‚ a diglyceride and a simple molecule e.g. choline. The tail is hydrophobic and is made up of fatty acids. Phospholipids receive and transmit signals across the cell membrane and act as a store room for energy. The main role of phospholipids is that they can form lipid bilayers. It is an amphipathic molecule. The
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are in an area‚ the more collisions there will be. These collisions cause molecules to push away from each other. So‚ over time‚ the molecules of a substance will continue to spread out. Eventually‚ they will be spread evenly throughout the area. Osmosis is the diffusion of water. (when “the substance” that is diffusing is water)
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Osmosis in potato cells Aim: To view and examine the effect different concentrations of sucrose solution has on the movement of water across the cell membrane. Hypothesis: That the potatoes will either increase or decrease in mass‚ due to the effect of the different concentrations. Osmosis will occur. Apparatus: * Fresh potatoes * Apple corer * Scalpel * Petri dishes X 10 * 50ml measuring cylinder * Distilled water * Paper towelling * Sucrose solutions:
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Osmosis and Scientific Method Lab Report Abstract The purpose of the lab is to see how different size potatoes have faster water movement depending on the concentration of sucrose it was placed in. We had two sized potatoes‚ 6g and 10g‚ and placed each in three different dilutions of sucrose at 0.5M‚ 0.1M‚ and 0.05M. We also placed a 6g and 10g potato piece in water to act as a control. Based on the weight percent change over 60 minutes‚ the 6g potato piece had faster water movement than the
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4000310515center095000420003263900175001760220OSMOSIS IN POTATO CELLS 450000OSMOSIS IN POTATO CELLS 42672007972425Aruna DhungelbIOLOGY 2A OCTOBER-28-14 00Aruna DhungelbIOLOGY 2A OCTOBER-28-14 Osmosis in Potato Cells Aruna Dhungel Biology 2A October 28 2014 Purpose: To see how much osmosis or diffusion will occurs in potato cell based on the concentration of molarity. Procedure: Obtained 3 cups and label A‚ B‚ and C To cup A added 150ml H2O and 8.775gNaCl (stirred cup)
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The book A Raisin in the Sun had many themes‚ motifs‚ and symbols. Value/Purpose of dreams (theme)‚ Home (Motif)‚ and Mama’s Plant (symbol) had many similarities and differences. Value/Purpose of dreams are each of the Younger’s dreams throughout the play. Beneatha wanted to be a doctor‚ Walter wanted to buy a liquor store to start a business‚ Mama wanted to own a garden‚ Travis wanted to be a bus driver‚ and Ruth wanted to get out of the “rat trap.” When the Youngers fail to make their dreams reality
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doctor…” – Beneatha‚ A Raisin in the Sun I used this quote to support my idea because she is telling everyone that she is going to be a doctor no matter. “thank everybody! And forgive me for ever
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While Antigone by Sophocles and A Raisin in the Sun by Lorraine Hansberry are very difference stories they have many similarities. Antigone is the about daughter of Oedipus trying to do what she believes is good. Her brothers have killed each other and while one gets a proper burial‚ the other is left to be eaten by wild animals. The reason he is not allowed to be buried is because King Creon believes he is unworthy of it. The main character Antigone defies Creon’s law and buries her brother anyways
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Introduction Diffusion and osmosis are two types of passive transport. Diffusion is a random movement of molecules from an area of high concentration to an area of low concentration. Osmosis is a type of diffusion that diffuses water through a selectively permeable membrane. There were two parts to the experiment‚ the dialysis tubing lab and the potato lab. In the first experiment‚ the dialysis tubing acted as a semi-permeable membrane. A semi-permeable membrane is a membrane
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2017‚ I attended a play called A Raisin in the Sun. The play took place at the Polk Theatre at the Tennessee Performing Arts Center in Nashville‚ TN and it was directed by Rene Copeland. A Raisin in the Sun was written by a woman named Lorraine Hansberry. The play is a reflection of Lorraine Hansberry’s childhood experience. She was the first African American woman to write a play that was performed on broadway. At the age of 34 she died from cancer. A Raisin in the Sun was a play that gave multiple
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