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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immersed into the distilled water‚ then it will be the heaviest out of the three. This is because water is at the lower is moving toward the area of higher concentration‚ which in this case is the potato. This solution is a hypotonic solution which is exactly opposite as a hypertonic because the outside of the cell has a higher concentration of water than the inside‚ and so the water on the outside goes inside the cell. As the water moves inside of the potato‚ it will cause the potato to gain weight
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When Different Colors of Food Coloring Are Soaked into a Naked Egg‚ Will the Mass Change Depending on the Color of the Ink after 7 Days? The Purpose The purpose of initiating this lab was to test how different chemicals in the outer fluid affects the osmotic properties of a naked egg. Background Information In order to complete this experiment‚ one of the most important things you need to know how to do is how to take the outer “shell” layer off of the egg. The egg shells contain an element known
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Beaker #1‚ which is filled to 200 mL of tap water? My prediction is that there will be no change in the weight. Since solutions that contain the same concentrate of solute particles per volume of a solution that than within the cells are said to be isotonic solutions‚ which means the concentration of a solute particles is the same on
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BIOLOGY REVIEW UNIT 1 BIOCHEMISTRY 1) Describe the structure of an atom and compare this to the structure of an ion. * Atoms have protons and neutrons in their nucleus making them electrically neutral 2) Complete the following table Element Name | Boron | Oxygen | Beryllium | Sodium | Symbol | B | O | Be | Na | Atomic # | 5 | 8 | 4 | 11 | # of Protons | 5 | 8 | 4 | 11 | # Neutrons | 6 | 8 | 5 | 12 | Total # electrons | 5 | 8 | 4 | 11 | #Electrons in 1st Shell | 2 |
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Bibliography: Corbis Coporation. (2009‚ September 22). Human Red Blood Cells in Physiological Isotonic Saline Solution (0.9% nacl) Sem x1000 by Dennis Kunkel Microscopy‚
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STUDY GUIDE FOR PRACTICAL #1 Spring 2015 Bio 115 (Biology I Lab) 1. Be able to identify the parts of the compound light microscope. Know the functions of those parts. 2. Understand how to focus a slide/specimen under the microscope. Be familiar with the steps taken to focus under low and high power. Be ready to define and calculate total magnification and know what happens to the field of view when the magnification is increased. 3. Understand how to measure the field diameter using a
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was due to the reason that the solution was hypertonic. There was a higher concentration of solute and lower concentration of water in the solution than there was in the potato cells. This led the water to travel down its concentration gradient‚ which was from a higher concentration (in the cell) to a lower concentration (in the solution)‚ which meant the potato cells lost water‚ therefore the potato lost mass. The 0.300M solution was also a hypertonic solution. The only difference is that the concentration
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OSMOSIS LAB BACKGROUND INFORMATION. Dialysis tubing is being used to model a plasma membrane. Isotonic solutions are solutions that have the same concentration of solutes on both sides of the membrane. Hypertonic solutions are solutions that have more solute to the one with less solute. Hypotonic solution are solutions that have less solute to the one with more solute. RESEARCH QUESTION:which dialysis tubing will gain the distilled water and which one will loss its content
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suitable concentration. (a) Amoeba‚ living in freshwater‚ uses a contractile vacuole to expel the excess water from its cytoplasm (thus need more respiration/O2/ATP than isotonic (marine) Amoebae). (b) The kidneys maintain the blood (thus‚ whole body) at the correct concentration. Osmosis and Plant Cells (a) Plant Cells in a hypotonic (= weaker) solution – cells have lower water potential • the plant cells gain water by osmosis. • the vacuole and cytoplasm increase in volume. • the cell membrane
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