Feeding Frenzy Lab Essay Example

Feeding Frenzy Lab Essay Example Feeding Frenzy Lab Essay Feeding Frenzy Lab Essay We will use chemical reagents to test to determine the presence of macromolecules: Benedicts solution for sugar, Iodine for starch, Berets reagent for protein, and Sudan Ill for lipids. If we test buttermilk biscuits for starches, sugars, proteins and lipids then it will test positive for all. If we test potato chips for starches, sugars, proteins and lipids it will then test positive for lipids and starch. If we test peppers for starches, sugars, proteins and lipids then it will test positive for only sugar. If we test sardines for starches, sugars, proteins and lipids then it will only test positive for proteins and lipids. Our hypotheses is based on our knowledge of the four foods we are testing. When available we consulted nutritional provided on food label. The supplies we used are: Safety Goggles, Beakers, Hot Plate, Gloves, Benedicts Solution, a scale that measures grams, Test Tubes, Iodine, Measuring spoon, Test Tube rack, Beirut reagent, Kara Syrup (glucose), Test Tube Rack, Sudan Ill reagent, Laundry Starch, Eye Dropper, Brown Paper Bag, Egg Whites, Glass Stirring Rod, Fork, knife, spoon, Vegetable Oil, Distilled Water, Plastic Cups, Blender, Mortar and pestle, graduated cylinder, deuterium biscuits, potato chips, hot peppers and sardines. Http://www. Stephenson. Coherence/classes/biology/units ) Prefab Brainstorm what foods you want to test and for what macromolecules you AR e testing. 2. Complete the 15 Questions for Investigation. 3. Decide who is going to bring what foods. Hint: lighter color foods yield more a accurate results. ABA 1 . Create positive and negative test controls for each mac romolecule test. A. Lipids Positive Controlling a test tube 4/5 full with vegetable Oil. Pour 10 drops of Sudan Ill into the test tube with the vegetable oil. : Label the test tube as p costive control lipids using masking tape and place in the test tube rack. Negative Controlling a test tube 4/5 full with distilled water. Pour 10 drops of Sudan Ill into the test tube with the water. Label the test tube as en active control lipids using masking tape and place in the test tube rack. A. Sugar Positive Controlling 1 Go of Kara Syrup with mill of distilled water in a beaker. Fill a test tube 4/5 with the solution. Pour 10 drops of Benedicts Soul Zion into the test tube. Clean the beaker. Fill the beaker full of water. Place the beaker full of water on a to plate and turn the hotplate on high. Place the test tube in the beaker full of water and boil for 5 minutes. Label the test tube as positive control sugar using masking TA pee and place in the test tube rack. Negative Controlling a test tube 4/5 full Of distilled Water. Pour 10 drops of Benedicts Solution into the test tube. Fill a beaker full of water. Place the b eager full of water on a hot plate and turn the hotplate on high. Place the test tube in the beaker full of water and boil for 5 minutes. Label the test tube as negative control gaff u sing masking tape and place in the test tube rack. . Protein Positive Controlling leg of eightieth powder (or albumen) with mill of distilled water in a beaker using a glass stirring rod until all of the powder is did solved. Pour the solution into a beaker until the beaker is 4/5 full. Pour 10 drops of Beirut reagent into the test tube with the solution. Label the test tube as positive control protein SSI Eng masking tape and place in the test tube rack. Negative Control Fill a test tube 4/5 full with distilled water. Pour 10 drops of Beirut reagent into the test tube with the water. Label the test tube as negative intro protein using masking tape and place in the test tube rack. A. Starch Positive Controlling 1 g of corn starch with mill of distilled water in a beaker using a glass stirring rod until all of the powder is dissolved. Pour the solution into a beaker until the beaker is 4/5 full. Pour 10 drops of iodine reagent into the t est. tube with the solution. Label the test tube as positive control starch using masking tape an d place in the test tube rack. Drops of iodine reagent into the test tube with the water. Label the test tube control starch using masking tape and place in the test tube rack. . Make the foods you are testing into a solution. A. This can be done With a mortar and pistil or a blender. Place your crunched u p food into a beaker. Add water to your food in the beaker to make it into a solution. Filter the chunks out by pouring the solution through a screen and/ or cheesecloth into another beaker. 2. Pour the food solution into as many test tubes as the number of tests you are performing. For example, if you are testing for starch, sugar, protein, and lip ads you will need four test tubes. Label each test tube with the food that is being tests and the macromolecule you are testing for using masking tape. 3. Place 10 drops of the appropriate reagent in the appropriate test tube. A. Sugar Benedicts Solution must be heated with food in order to produce a result b. Starch Iodine c. Protein Beirut reagent d. Lipid Sudan Ill reagent 4. Compare your results to the positive and negative test controls. 5. Record your data in a data table 6. Complete a lab report by following the lab report template. All sections are re quirked except calculations. 7. Type up your lab report using Google docs and invite all interested parties. . Post your lab report on your unit 2 weeping. The trial calls for multiple tests and multiple tests should be done to get the b est. results. The independent variable is food type, while sugar, lipids, protein, starch are t he dependent variable. The control variable and what must be kept constant is the + starch, + protein, + Lipid, + sugar. In a way thats the control trial and what you compare results to . Your suppose to test for + starch, + protein, + Lipid, + sugar and see if your food is positive n active starch, protein, lipid, and sugar. Data and Calculations Observations During this experiment we observed how the color of our food distillations changed with the different solutions. Each solution reacts differently. For example, when testing for the pepper for starch, iodine was added, and when the solution turned dark and cloudy, compared to the control it was obviously a protein positive.