"Yeast" Essays and Research Papers

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    amount of CO2 produced was calculated with a vernier gas pressure sensor. The control group was yeast and white sugar and the experimental group was yeast and brown sugar. The hypothesis that if brown sugar and yeast are mixed‚ then it will produce more CO2 than a mixture of white granulated sugar and yeast was accepted. The white sugar and yeast mixture had a slope of .003254 kPa/s. The brown sugar and yeast mixture had a slope of .0182 kPa/s. This means that the brown sugar mixture produced more CO2

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    Abstract The aim of this experiment was to investigate the effect of temperature on the enzyme catalase. The original research question was exploring the effect temperature would have on a yeast catalase reacting with hydrogen peroxide (H2O2). To address the latter question a series of experiments were conducted. The various temperatures experimented with were as follows: 22 degrees Celsius (room temperature)‚ 0 degrees Celsius (freezing)‚ 100 degrees Celsius (boiling)‚ and 37 degrees Celsius.

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    put evolutionary pressure on brewer’s yeast cells‚ which are single celled organisms‚ to become multicellular. To do that‚ Dr. Ratcliff put lines of yeast in 10 different flasks of broth. Dr. Ratcliff and his team then let flasks shake for a day so that the yeast would settle. The next day a drop was removed from the flask and placed in a new one. This would select for yeast cells with a mutation that would lead to settling towards the bottom the fastest‚ as yeast from the bottom would be taken to a

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    Cerevisiae Lab Report

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    absorbance of salt‚ dead yeast cells‚ contamination‚ plate overgrowth‚ and the yeast cells drying from being under the vent in the incubator. In the future‚ we can do this experiment more effectively by having more than three weeks to perform the experiment as well as letting the yeast grow for more than twenty-four hours. As a result of having a longer amount of time to do the study and letting the yeast grow for longer than twenty four hours‚ we would get better results; yeast multiplies and divides

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    dependent upon yeast. Without yeast we would lose one of the most fundamental grains (bread) as well as the choice drink of many‚ beer. More importantly though Saccharomyces cerevisiae is a model eukaryotic organism for understanding cancer at a cellular level‚ from it we have learned how to identify cells with an elevated potential to become cancerous‚ are able to study cancerous characteristics and can test cancer treatments on yeast. (Nitiss & Heitman‚ 2007; Sheltzer et al‚ 2011) Yeast has been key

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    Cellular Rspiration

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    respiration in yeast/onion cells. * Measure respiration rate using different substrates. * Measure respiration rate at different temperature. Introduction: In this laboratory experiment‚ we are given 3 task. The first one is respiration in yeast. Second is respiratory indicator and the third one is observing mitochondria in yeast/onion cell. The first experiment is about investigation of sugars yeast. We will determine which sugars yeast can be use for cell respiration. When the yeast undergoes

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    controlled? 3g of yeast added to 5 different conical flasks Measuring the mass of yeast using the balance. With having a fluctuation in the mass of yeast indicates different population numbers‚ this will

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    reaction by yeast‚ starting with glucose as an energy source. 4. The student will understand how to measure fermentation rate. II. Introduction The student is to use this lab exercise as the foundation for writing a scientific method report. The instructions for writing the report are found in the addendum section of the lab manual. The purpose of the experiment is to test the effect of five different temperatures on the rate of carbon dioxide production in yeast. The

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    Lab 7: Catalysts Introduction Pre-Lab Questions 1. What is a catalyst? An enzyme is a biological catalyst that speeds up chemical reactions in the body. 2. If you continue to add more catalyst will the speed of a reaction always continue to increase? Explain your answer. It will continue to speed up the reaction until there is more catalyst than the limiting reactant. 3. In this lab you will produce oxygen and water from hydrogen peroxide (H2O2). Write a balanced reaction equation for this reaction

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    Balloon Respiration Lab Introduction/ Background Cellular respiration is a process that releases chemical energy from glucose and other carbon-based molecules to produce ATP when oxygen is present. The formula for cellular respiration is C6H12O6+ 6O2= 6CO2= 6H2O. The process of respiration contains three main parts‚ glycolysis‚ Krebs cycle‚ and the Electron Transport Chain. The process of glycolysis takes place in the cytoplasm and is considered an anaerobic process which splits glucose into two

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