Estimating Osmolarity of Plant Cells Criteria Assessed: DCP Introduction In this experiment you will be estimating the osmolarity of potato cells by finding their change in weight in solutions of known molarity. The object is to find the molarity where the mass does not change. No net change in weight indicates that there has been no net gain or loss of water. This is a means of indirectly finding the osmolarity of the cells themselves. Apparatus 1 large potato Petri dish 7 x 250 ml beakers
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The Variation of Yeast Cells When Adding an Antibiotic Biology 1401- A October 21‚ 2013 Abstract. -- The main focus in this experiment was to find out if antibiotics affect yeast cells culture when added. The observation of the two cultures along with the yield of yeast cell reproduction between the two cultures was the sole purpose of the experiment; culture-A (- antibiotic) and culture-B (+ antibiotic). Our hypothesis stated whether antibiotic effects yeast cells cultures. This theory was
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reactions light-dependent and light-dependent reactions. The light dependent reactions are the first stage‚ where energy from sunlight is captures in Photosystem 2 and then 1‚ the electrons generated in Photosystem 1 then moves along the electron transport chain. The moving of electrons causes a hydrogen ion gradient that is used in the final step to produce ATP‚ by the ATP Synthase. The equation for this reaction is 6CO2 + 6H2O C6H12O6+6O2 or‚ carbon dioxide +water sugars + oxygen . This reaction
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of basic units of matter called atoms. When atoms are bonded together they make up a molecule. Often associated with nonliving things are inorganic molecules‚ and associated with organisms are biomolecules. Today in lab‚ a series of tests were ran. Tested were the biomolecules of cells which are lipids‚ sugars‚ proteins and starch. The purpose of these tests were to test for the presences of cellular biomolecules. Some of the things that fat consist of are one glycerol and three fatty acids. Proteins
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Gbengon‚Sennie Microbiology Lab Case study # 5 November 1‚2012 1. What evidence suggests that the young graduate student has contracted what disease? Ans: The signs and symptoms the young graduate student presented‚ show evidence of Lyme disease. 2. What is the environmental pathway for the vector of this disease? Ans: The environmental pathway for the vector of this disease would be a forested habitat. The black-legged tick or the deer tick is the principle vector of this disease (Lyme
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leaves prevent the large loss of water from leaf due to transpiration. For the lab‚ I observed six leaves collected from six different plants growing sporadically around the school campus. Using clear tape‚ sticking it to the bottom of each leaf‚ applying pressure‚ and carefully peeling the tape off for an imprint of the leaf. I stuck the tape onto a glass slide and placed it under the microscope and observed the cells. Adjusting the magnification down 1000x‚ it is noticeable that the stomata were
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(Photosynthesis Lab background)
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Effects of pH on the Function of Enzymes Rena Mototani Glen Rock High School Advanced Biology 2014-2015 Effects of pH on the Function of Catalase Rena Mototani Problem: How does the pH of a cell affect the function of the enzyme catalase? Introduction In this lab‚ we experimented the effects of pH on the function of the enzyme catalase. Catalase is an enzyme that brings about the reaction by which hydrogen peroxide is decomposed to water and oxygen (Encyclopedia Britannica). The
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For this to happen‚ the molecules need to dissolve through a partially permeable. Osmosis is the diffusion of water as it goes from dilute to a more concentrated solution. Active transport is the movement of molecules from low concentration to high concentration against the concentration gradient. Energy is required for movement to occur. Water Balance- Salt concentration in blood depends on how much water is reabsorbed by kidneys
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Raw Data: • Table one; shows the effect of water temperature has on the rate at which the anthocyanin pigment leaves of a beetroot tap root cells • My groups results are highlighted in yellow and the class results are left blank Temperature ͦC (+/- 1 ͦC) Amount of green light that was absorbed by the solution (+/- 0.001) Group 1 Group 2 Group 3 Group 4 Group 5 Group 6 Group 7 20 0.099 0.188 0.202 0.141 0.152 0.143 0.157 30 0.274 0.173 0.205 0.170 0.262 0.180 0.233 40 0.285 0.127
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