Formal Scientific Lab Report Osmosis Katy Hunter 10-26-2012 Abstract: The objectives of this lab was to be able to create models of cells with the dialysis tubing to show us how the plasma membrane is selectively permeable‚ to study the effects of osmosis on a model cell‚ and to foresee the effect of solute concentration on osmosis. In order to achieve these objectives‚ we had to fill the dialysis tubing with either water‚ or different amounts of sucrose. We then tied off the tubes and put
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shown in Figure A. Two separate adjustable supplies (VGG and VDD) were used for the experiment. The grounds for both supplies were connected to the circuit ground. 2) The VDD was adjusted to 24V A. With VDD = 24V‚ VGG was adjusted to 0V. i) Measurements. Answers were recorded in Table 1 The Gate-Source voltage (VGS) and Drain-Source (VDS) were measured and recorded. ii) Calculations. Answers were recorded in
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Experiment IV: Study of Krebs cycle using Mitochondria from Mung Bean Seedlings INTRODUCTION The mitochondria is a very important organelle in the plant cell because it carries out very important cellular reactions in the cell like the Krebs cycle and oxidative phosphorylation which is how the plants produce ATP from the pyruvate produced through glycolysis (Meyer and Millar‚ 2008). Glycolysis produces a net of 2 ATP for the plant which is not enough for the cell to function while the Krebs cycle
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will increase‚ the pH will decrease‚ and the process of cellular respiration will be replaced by fermentation. Parts of the hypothesis were supported while others parts were disproved. The balloons’ circumferences‚ cellular respiration being replaced by fermentation‚ and forearm muscle fatigue were supported by the data. However‚
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Lab Report Microbiology Introduction Bacteria can be found almost anywhere. For human life‚ some help us‚ some hurt us‚ and others are neutral. It is now known that good bacteria‚ or normal microflora‚ can reach 1014 microbial cells. This is far more than the 1013 cells that make up the human body (Tannock‚ 1995). The total number of bacteria on Earth is estimated to be around 4-6 x 1030 (Horner-Devine‚ 2004). It is important to know the extent of bacteria‚ how they live‚ and how they are
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Genetics of Drosophila Lab Report: The test of heredity in fruit flies In my testings with breeding the fruit flies‚ I learned that the purpose of breeding them was to test how genetics pass from generation to generation‚ also known as heredity. We attempted to breed the flies and get them as close to a 9:3:3:1 ratio as possible. This would lead to an acceptable trait ratio. My hypothesis was that if we were to breed the flies in a stable environment‚ the most common fly (or the fly with the highest
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Activity from pH and Concentration Abstract Enzymes are the key to many of the chemical reactions that our bodies depend on to live. Without enzymes‚ we would not exist. These biological catalysts speed up the reactions as well as reduce the amount of activation energy needed to complete the process. Knowing how important enzymes are to us‚ it is important to realize what they require to function. They need select conditions and rates to work right. These conditions can range from what level of pH to use
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One of the factors that affect the rate of reaction of hydrogen peroxide by catalase is the pH. Enzymes needs a very specific range of pH in order to function properly‚ so does catalase. In this experiment the reaction of H2O2 will be seen the presence of catalase at different pH level to see how pH affects the rate of reaction of H2O2. As the breakdown of H2O2 produces oxygen gas so the Biology Gas Pressure Sensor will be used to detect the pressure
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is colorless when it is an acid and pink when it is a base. Ammonium is familiar base‚ used for cleaning oils and grease from any types of surfaces. Ammonium is a fairly strong base with a pH of 11 and will dissociate completely into an aqueous solution (water). Water is universal and has a neutral base with a pH of 7. A Danish chemist named Johannes Bronsted and an English chemist by the name of Thomas Lowry suggested and then defined two theories. The bronsted-lowry theory defines an acid as a
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In general‚ there is always human error. This could cause measurements to be off a bit‚ timing to be too long or too short‚ or even recorded data to be mistaken. Also‚ perhaps the test tubes did not incubate in the water baths long enough or maybe too long so the temperature was not precise. Scientists may have forgotten
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