reaction that takes place when yeast breaks down the hydrocarbon molecules is called cell respiration. As the aerobic respiration breaks down glucose to form viable ATP‚ oxygen gas is consumed and carbon dioxide is produced. This lab focuses on studying the rate of cellular respiration of saccharomyces cerevisiae‚ baker’s yeast‚ in an aerobic environment with glucose‚ sucrose‚ lactose‚ artificial sweetener‚ and water as a negative control. A CO2 Gas Sensor Probe is used to measure the amount carbon dioxide
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water. e) Hydrophobic and hydrophilic: Hydrophobic avoids water‚ whilst hydrophilic is attracted by it. 2. a) Hydrolysis of maltose: glucose + glucose = maltose + H2O b) The condensation reaction that forms a triglyceride: Glycerol + 3 fatty acids = triglyceride + 3H2O c) Hydrolysis of starch to remove a single molecule: Starch + H2O = 3 glucose 3. The transparency of water is important to life because it allows organisms living in water to absorb the sunlight and carry out photosynthesis
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Yeast and Sugar - The Chemistry must be right Jansen‚ C. Gymnasium Felisenum‚ The Netherlands 14-04-2010 Summary Yeast can metabolize sugar in two ways‚ aerobically‚ with the aid of oxygen‚ or anaerobically‚ without oxygen. In this experiment yeast ferment sugars anaerobically. When yeast ferments the sugars anaerobically‚ however‚ CO2 production will cause a change in the weight of the sugar/yeast-solution. This raises a further question: What is the effect of different kinds of sugars
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1. The graph shows the blood glucose concentrations (in mMol) at fixed times over 2 hours (0‚ 15‚ 30‚ 60‚ 90‚ 120 minutes) after the intake of drink (diet coke and coke). 2. At time-point 0‚ there was no differences between the groups (p=0.743‚ t-test‚ n=6). The difference in the mean values of the two groups is not great enough to reject the possibility that the difference is due to random sampling variability. There is no statistically significant difference between the blood concentrations
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you expect? If the amylase successfully digests the starch‚ I would expect a no color change occur as well as a presence of glucose in the intestine (Dialysis tubing). If the amylase only partly digests the starch‚ what would you expect to happen? If the amylase only partly digests the starch‚ I would expect to see a faint color change as well as a small presence of glucose inside the intestine. If the amylase fails to digest the starch‚ what results would you expect? If the amylase fails
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CARBOHYDRATES 1322 Classification • Simple carbs consist of 1 or 2 sugar units • Monosaccharides • Glucose‚ fructose‚ galactose • Disaccharides • Sucrose‚ lactose‚ maltose • Oligosaccharides consist of 3-10 sugar units • Not a simple or a complex carb • Complex carbs consist of 10 + sugar units • Polysaccharides • Starch and fiber Monosaccharides 6 carbons= hexose Monosaccharides • Glucose • Most abundant carbohydrate • Preferred source of energy for the RBC‚ brain‚ and nervous system •
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significance of the research is to identify and correlate the human body’s pattern of fluctuation of glucose and insulin‚ to the sugar content in the food we eat and drink. We are trying to prove that when we consume “sugary” drinks or foods‚ that our blood glucose levels rise sharply‚ and slowly our body will start absorbing that glucose into our tissues through the aid of insulin‚ and blood glucose levels will again lower to normal levels. In our case we used soda‚ and diet soda to determine the
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common. They all have some form of glucose. With all of them containing glucose‚ they all provide organisms with energy‚
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results are Benedict’s test: orange to brick red Tollen’s test: metallic silver Starch iodine test: blue-black 3. Identify each of the samples in Part 1 as monosaccharide‚ disaccharide or polysaccharide. Water = not a saccharide Glucose = monosaccharide Fructose = monosaccharide Galactose = monosaccharide Sucrose = disaccharide Lactose = disaccharide Starch = polysaccharide Honey = primarily monosaccharides with some disaccharide Saccharine = not a saccharide Nutrasweet
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their physical & chemical properties • For example‚ galactose‚ glucose and fructose have the same molecular formula (C₆H₁₂O₆) but different structures (figure 6 page 30) • glucose itself has 3 different structural isomers in dry state‚ glucose has a linear structure‚ but when dissolved in water‚ the molecules fold on itself to form one of the two possible ring structures: α-glucose (alpha) β-glucose(beta) two isomers of glucose differ only in the orientation of a single hydroxyl (-OH) group
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