Respiration and Fermentation Lab on-line #10 Objectives: Monitor respiration activity in yeast by observing CO2 production as sugar is metabolized Investigate the effects of temperature on yeast fermentation Respiration Living cells use ATP (adenosine triphosphate) as their energy "currency". The energy released when a molecule of ATP is hydrolyzed (ATP ADP + PO4) is used to drive cellular reactions. To stay alive‚ a cell must continually regenerate its supply of ATP (from ADP
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* Define anaerobic respiration * State the word equation for anaerobic respiration in muscles during hard exercise * State the balanced equation for anaerobic respiration in muscles (C6H12O6 → 2C3H6O3) and the microorganism yeast (C6H12O6 →2C2H5OH + 2CO2)‚ using symbols * Describe the effect of lactic acid in muscles during exercise * Describe the role of anaerobic respiration in yeast during brewing and bread-making * Compare aerobic respiration and anaerobic respiration in
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"Specialized Cell Structure and Function." : Cellular Respiration â FactMonster.com. 2000–2012 Pearson Education‚ Publishing as Fact Monster‚ n.d. Web. 25 June 2012. <http://www.factmonster.com/cig/biology/cellular-respiration.html>. "Fermentation." McGraw-Hill Higher Education: Anatomy & Physiology Prep. Mcgraw-Hill‚ 2007. Web. 25 June 2012. <http://www.jlhahnconsulting.com/prepsteps1/bioF6.html>. Smith‚ S.E.‚ and O. Wallace. "Why Is Metabolism
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due to the energy of the sun. (http://en.wikipedia.org/wiki/Bio_ethanol) In the production of bio ethanol fuel‚ the process of anaerobic respiration is included in the process of fermentation. In this process‚ the glucose (C6H12O6) from the feedstock is broken down into two molecules of pyruvic acid through glycolysis. With the presence of yeast molecules from the yeast (Saccharomyces serevisicie)‚ the pyruvic acid is broken down into Carbon Dioxide (CO2) and Acetaldehyde. The acetaldehyde then acts
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Length Research Paper Ethanol production potential of local yeast strains isolated from ripe banana peels A. A. Brooks Department of Microbiology‚ University of Calabar‚ P.M.B. 1115‚ Calabar‚ Nigeria. E-mail: brooks.akan@yahoo.com. Tel: 08037956762. Accepted 16 May‚ 2008 The ability of different yeast strains isolated from ripe banana peels to produce ethanol was investigated. Of the 8 isolates screened for their fermentation ability‚ 5 showed enhanced performance and were subsequently
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Factors that affect the rate of fermentation are the nutrient availability and the concentration of that nutrient. In the Barfing Bag experiment‚ our control group which was granulated sugar worked the best against splenda‚ artificial‚ and stevia which a sugar substitute that comes from a plant and has 0 calories. In the barfing bag experiment we had three bags with yeast and then we added different types of sugars to test which type of sugar creates the most carbon dioxide or which bag inflates
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three-carbon sugar. These 2 molecules are call Pyruvate. Glycolysis produces two molecules of ATP and 2 molecules of NADH . In the presence of oxygen‚ glycolysis is the first stage of Aerobic Cellular Respiration. Without oxygen‚ it is called Anaerobic Cellular Respiration. Stages of ATP Production • Conversion: If the 2 Pyruvates have enough oxygen‚ it becomes 2 acetyl-CoA. During this step‚ you can generate 2 NADH and CO2. It occurs in Mitochondria. Stages of ATP Production • Krebs
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DESIGN: Research Question What effect does varying the alcohol concentration of yeast have on its fermentation? Introduction Fermentation is the stage during which most CO2 is produced. When no oxygen is available‚ yeast will switch to an alternate metabolic pathway utilizing sugars for energy and producing‚ primarily‚ CO2 and ethanol. Yeast divides rapidly in this phase‚ reaching its carrying capacity (about 50 million cells/ml) in the wort‚ or must‚ and remains suspended
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biochemical systems Anaerobic glycolysis fermentation Aerobic Krebs cycle electron transport system respiration pathways are different between prokaryotes General Formula for Respiration 1 glucose 6 oxygen 6 carbon dioxide 6 water energy Glycolysis (lysis breakdown) sugar is broken down First stage in all respiration pathways Takes place in cytoplasm Input glucose Products 2 pyruvic acids 2 ATPs 2 H atoms (NADH2) No oxygen required (anaerobic) Pyruvic acid is a three
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Chapter 5 The Working Cell Energy • Capacity to do work • Types of energy – – – – Kinetic energy – energy of motion Potential energy – stored energy Thermal energy - heat Chemical energy - potential energy of molecules • Thermodynamics – Study of energy Oxidation-Reduction Reactions • When an atom or molecule loses an electron‚ it is said to be oxidized – process called oxidation • When an atom or molecule gains an electron‚ it is said to be reduced – process called reduction
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