The plasma membrane of a cell is extremely important to the transportation of substances into and out of the cell. The outer membrane of a cell is made up of lipids and proteins. Most of the lipids in plasma membranes are phospholipids. The phospholipids have a hydrophilic head and two hydrophobic tails. When engulfed in water‚ they arrange themselves such that all the hydrophobic tails clump together‚ surrounded by the hydrophilic heads‚ protecting the tails from the exposure to the water. In cells
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surface area of the leaf larger. The reason I think a higher light intensity could make the surface area larger is the fact that there would be a larger amount of chlorophyll‚ containing chloroplasts‚ for photosynthesis. By having leaves of a larger surface area‚ there would be a much more efficient use of the chloroplasts (containing chlorophyll) and the high intensity light available. Apparatus In order to carry out this experiment we will need: ·A light probe ·A graphing calculator ·A ruler Method
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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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Biology- cell organelles assignment Animal cells: Introduction: An animal cell is called a eukaryotic cell; it has a cell membrane‚ cytoplasm and a nucleus. The cell surface is covered by a membrane only. The cell membrane is strong and keeps the cell together even though it is thin and flexible. The cell membrane also controls what goes in and out of the cell e.g. nutrients go in and waste comes out. The cytoplasm is inside the nucleus and it controls the cells activities. An animal is
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is converted into chemical energy in the form of organic compounds. 8. What is the purpose of chlorophyll? Absorb light energy Why is it green? Green Color reflected 9. What can happen to light when it strikes an object? Reflected‚ Absorbed‚ and Transmitted 10. What happens when chlorophyll absorbs light? Electrons are raised to a higher energy level 11. Where do the electrons from a chlorophyll molecule go when they move to a higher energy level? Electron transport chain 12. Electrons
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Photosynthesis is the process by which light energy is used to convert inorganic compounds into organic substances with the subsequent release. There are many factors which can have an effect on the process of photosynthesis; in this laboratory experiment‚ the focus lies on carbon dioxide (CO2) availably and its effect on photosynthesis. By understanding the component that affect the rate of photosynthesis‚ one can do work to try and increase the rate of photosynthesis. The purpose of this laboratory
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NADPH – Reduced NADP The energy from sunlight is used to excite an electron‚ within a primary pigment‚ to a higher energy level. The excited electron is then donated to an electron acceptor leaving the chlorophyll molecule oxidised and reducing the acceptor. Chlorophyll a ----------------chlorophyll a+ (oxidised state) + e- The electron is then passed along a series of electron acceptor‚ each with a lower energy level than the one before as the electron is passed along each carrier becomes sequentially
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then passed along the Electron Transport Chain. Chlorophyll loses an electron‚ but interestingly‚ those missing electrons are replaced through enzymes in the thylakoid membrane‚ which divide H20. Secondly‚ electrons move through the Electron
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the sun’s UV-rays and use it to create and store sugar that is transformed into ATP by cellular respiration later on in the process. In plants‚ this process takes place in chloroplasts‚ which concentrate in the mesophyll cells‚ with the help of chlorophyll‚ the green pigment‚ which is directly involved in photosynthesis. It is important to understand that we see leaves green simply because the green color gets reflected the most and does not get absorbed by the "green" pigment. An interesting fact
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in the form of organic compounds. There are two phases in photosynthesis‚ the light reaction and dark reaction. The following experiment tested only the light reaction. Photosynthesis takes place on the chloroplast‚ and the chloroplast contains chlorophyll pigments which absorb light energy. Pigments are particular to different wavelengths. The following experiment helped determined the fastest photosynthetic reaction rate from wavelength ranging from 450‚ 545‚ 650‚ and 750 nm‚ and intensities 3‚
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