Posted: December 1st, 2020

Which control substance(s) should produce a negative result

Biology 124L Fall 2014Lab Report 1: Biological Macromolecules1. What is the central question you addressed in the experiment that you conducted with yourgroup’s experimental substance during this lab? (1pt)2. List the four macromolecule tests used in this lab and describe what a positive result lookslike. For each test, which control substance(s) should result in a positive test?3. Which control substance(s) should produce a negative result for all four macromoleculetests? (1pt)4. Explain why you ran each macromolecule test on four control substances (glucose, starch,oil, and protein) first, before testing your group’s assigned experimental substance. (1pt)5. Name your group’s experimental substance. Write the hypotheses and predictions for eachof the four macromolecule tests that you conducted on this substance. (1pt)6. Describe the experiment you conducted with your group’s experimental substance. You donot need to list procedural details, but state which macromolecule tests you performed, anddescribe the initial and final color of substances in the test tubes. (1pt)7. For each of the four tests, were the test results for your group's experimental substance positiveor negative? For each hypothesis regarding the experimental substance, describe the evidence forwhy your hypothesis was supported or not supported. (1pt)8. What are possible sources of error that could have affected your results? How could youreduce the level of error if you repeated your experiments? (1pt)9. How might these experimental methods be applied to address a question in the health orenvironmental sciences? (1pt)10. Below are the results from a macromolecule test performed on several substances. Reviewthe results. Which macromolecule test was being performed? What conclusions can be drawnabout the experimental substance from these results? (1pt)Material TestedColor (initial)Color (final)Proteinbluedark purpleWaterlight bluelight blueOil (lipid)light blue (separated)light blue (separated)Glucose (sugar)light bluelight blueStarch (polysaccharide)light blue (cloudy)light blue (cloudy)Experimental substance (beef soup)bluelight purpleBiology 124L Fall 2014Lab Report 1: Biological Macromolecules: Answer SheetPlease turn in only this answer sheet to your lab instructor. If your answers go beyond 1 page,please print the pages double­sided.Due Date: The beginning of your scheduled lab section during the week of September 2 nd.Name: _________________________________________ Section: ____________________12345678910Need help answering the questions attached dealing with my Biological Macromolecule experiment.the four macromolecule tests used in this lab was :Benedicts test,Starch,SudanIV,Biuret test.Substances tested :Glucose, tap water, water,oil (lipid), starch, and protein.My group’s experimental substance: Dessert Gelatin

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