Respiration Lab Poster

Respiration Lab Poster - Cellular Respiration Dana-Marie...

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Cellular Respiration Dana-Marie Gomes and Anthony Cavallaro (Section 21)
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Introduction Cellular respiration refers to the “most prevalent and efficient catabolic pathway for the production of ATP” . Most cells depend on glucose as a fuel molecule, but the cell cannot utilize the whole molecule. It must first be broken down by a series of enzymatic pathways that will break chemical bonds and convert energy to a usable form. Cellular respiration is generally divided into two categories, aerobic and anaerobic. The majority of eukaryotic cells require oxygen to metabolize glucose; these cells rely on aerobic respiration. Aerobic respiration produces as many as 38 molecules of adenosine triphosphate (ATP) for each molecule of glucose metabolized. In aerobic respiration, oxygen is used as the oxidizing agent and final electron acceptor. For this portion of the experiment, we will use mitochondria to monitor an enzymatic reaction in the Krebs cycle, one enzymatic pathway of aerobic respiration. This reaction will reduce FAD to FADH 2 , which will create free electrons that will enter the electron transport chain . In the sugars which contain glucose or which are chemically identical will yield substantial CO 2 production. Also, the greater amount of glucose present the more CO 2 will be produced. Another form of respiration, fermentation, is an anaerobic process that partially degrades sugars without using oxygen . This process is utilized by cells in oxygen-poor environments. By this process, glucose is converted in Pyruvate to generate two molecules of ATP, clearly less efficient than aerobic respiration. It produces ethanol and carbon dioxide as byproducts. In this portion of the experiment, we will use baking yeast to monitor the generation of carbon dioxide, and therefore observe the effects of different factors on the rate of anaerobic respiration. When
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This note was uploaded on 11/16/2011 for the course BIOL 107 taught by Professor Abbot during the Spring '08 term at UConn.

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Respiration Lab Poster - Cellular Respiration Dana-Marie...

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