Biology coursework: Substrate specificity in yeast AIM: To find out which substrate (glucose‚ starch‚ maltose‚ sucrose or lactose)‚ does yeast‚ the organism containing the enzyme‚ breaks down the quickest. Introduction: Usually‚ every enzyme has a specific substrate that is what we call the “lock and key” theory. We can try the reaction of an enzyme with different substrates and this enzyme will just work well with one of those substrates. One type of reaction catalyzed by enzymes is anaerobic respiration
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results compare to the actual results? The predicted results and the actual results were the same. Exercise 2: Testing for Sugars Observations Data Table 2: Benedict’s Reagent Results. Test Sample Predicted Results Benedict’s results #1 Glucose Contains sugars Red #2 Starch Contains sugars Blue # 3 Onion juice Does not contain sugars Orange #4 Distilled Water Does not contain sugars Blue Which substances
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were able to observe and record starch Hydrolysis. (Table 1) * In order to test carbohydrate catabolism under anaerobic conditions we tested cultures of Pseudomonas aerugenosa‚ Escherichia coli‚ and Alcaligenes faecalis in tubes containing a glucose medium. After inoculating each tube with each of the bacteria 5mm of mineral oil was poured into one of the tubes containing bacteria to observe anaerobic respiration and while one remained without mineral oil. (Table 2) * We then observed protein
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microscope‚ chloroplasts (green organelles) in Elodea tend to bound to the cell wall in pond water‚ spread all over the cell in distilled water‚ pull away from cell wall in 20% NaCl. In our last experiment‚ we use a dialysis bag that contains 30% glucose and starch solution then place into a beaker of water and iodine solution. We then remove the bag out of the beaker‚ and use two test tube which label BAG‚ BEAKER to perform a Benedict’s test. We place solution in the bag in the BAG tube‚ and solution
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how starch and cellulose are treated to allow them to be used by the yeast? One potential ethanol feedstock is starch. Starch molecules are made up of long chains of glucose molecules. Thus‚ starchy materials can also be fermented after breaking starch molecules into simple glucose molecules. Examples of starchy materials commonly used around the world for ethanol production include cereal grains‚ potato‚ sweet potato‚ and cassava. A great amount of ethanol fuel is currently produced by starch
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molecules are Carbohydrates‚ Lipids‚ Proteins‚ nucleic acids. Carb is an abbreviation for carbohydrates. The body breaks down carbohydrates into simple sugars. Carbohydrates are easily used for energy by the body. The nervous system and brain need the glucose formed from breakdown of carbohydrates. If carbohydrates are not available‚ the body burns lipids/fats for energy. Lipids is the scientific name for fats. Lipids act as chemical messengers in the body. Lipids are the last to be digested and
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The data from this experiment demonstrates that the almond will produce a higher increase in the temperature of the water‚ when compared to the marshmallow. As shown in the observation chart‚ the change in temperatures for each almond trial is significantly higher than the marshmallow trials. It is also worth noting that the mass of the marshmallows are similar to that of the almonds. In fact‚ in trials one and three‚ the marshmallow has a larger mass than the almond. This information is significant
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fewer refined and processed carbohydrates that take away beneficial fiber. Examples: white bread and white rice. How does our body turn carbohydrates into energy? When carbohydrates are digested and broken down by the body they are converted into glucose‚ which is then used or stored as energy What is the function of carbohydrates? Carbohydrates provide the body with
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ANALYSIS OF VEGETABLES AND FRUITS INTRODUCTION Human body is like an engine. To keep it going we must provide it with the right kind of fuel. This is balanced food. A balanced diet is one which consists of the correct proportions of the five basic ingredients of good nutrition that is carbohydrates‚ fats‚ proteins‚ mineral salts and vitamins. The knowledge of various essential constituents of food and the food materials in which these ingredients are available is must. Deficiency of any
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solution? Hypothesis: * If a solution is rich in starch then it will react with iodine solution and change to a bluish-black color (looks Brown) Materials: Items: * 8 test tubes‚ pipet‚ iodine‚ onion juice‚ potato juice‚ sucrose solution‚ glucose solution‚ distilled water‚ fructose solution‚ starch solution‚ & beats juice Safety Concerns: * If the iodine touches skin it might burn * Everything smells bad chance of vomiting Procedure: 1. Get 8 test tubes and mark each one
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