Cellular Respiration Lab Write Up.docx - Taylor Johnson...

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Taylor Johnson Biology AP Pd. 3 Mrs. Brown October 27, 2017 Investigation 6: Cellular Respiration Lab Write Up Purpose: The question asked in this investigation was “What factors can affect the rate of cellular respiration?” Many factors can affect the rate of cellular respiration, but through this investigation the effect of temperature on cellular respiration was explored. Introduction: All organisms demand free energy and matter to maintain order, to grow and to reproduce. Free energy is made available primarily through the hydrolysis of ATP: the breaking of the phosphate bonds in ATP that yields ADP and the release of energy. This free energy is then able to drive metabolic pathways such as the ones in cellular respiration (AP Biology). Cellular respiration is the process in which cells create energy in the form ATP. Glucose, a sugar vital in providing energy for organisms, is obtained from food or light energy in the case of plants, and is the beginning reactant in the process of cellular respiration. Certain cell structures, such as the chloroplast, have a specific functions that play key roles in cellular respiration. Chloroplasts allow plants to capture light energy, and convert it into glucose through photosynthesis. This glucose can then be used for plant cells to perform cellular respiration. These metabolic reactions require the taking in and releasing of gases such as O2 (Oxygen) and CO2 (Carbon Dioxide) and yield by products in the forms of gases and compounds. In cellular respiration O2 is taken into the mitochondria of the cell, while H2O and CO2 are released. Therefore the rate of oxygen consumption in an organism would have affect on the rate of cellular respiration, as well as the output of carbon dioxide. Other variables such as temperature, and glucose concentration would also have affect on the rate of cellular respiration.
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