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Determine the presence of sugar

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Reference no: EM131711023

In this experiment, you will perform a series of tests to determine the presence of sugar, starch, lipids, and proteins for a variety of samples and determine the identity of an unknown.

Learning Objectives

Upon completion of this laboratory, you will be able to:
- Define protein, carbohydrate, lipid, and nucleic acid.
- Define a dehydration reaction and relate this reaction to the structure of a macromolecule.
- Describe the essential and nonessential amino acids that make up proteins.
- Compare and contrast simple and complex carbohydrates and how they are utilized metabolically.
- Describe the nucleotides in both DNA and RNA.
- List reagents used to identify biological macromolecules.
- Perform qualitative tests to determine the presence of lipids, sugars, proteins, and starch in a variety of samples.
- Identify an unknown through its composition of macromolecules.

Exercise 1: Starch and Sugar

Questions:
A. In each of the two tests (starch and sugar) a positive and negative control was used. What was the positive control in each of the tests and what was the negative control? Explain your answers.
B. Did the Benedict's test for reducing sugars net a positive or negative result for milk? Research the sugar content of milk and the definition of a reducing sugar to explain if your result is what you would expect.
C. Based on your results, is sugar and/or starch present in your Unknown? Use your results to explain your answer.

Exercise 2: Proteins and Lipids

In this exercise you will test a variety of samples for the presence of proteins (dipeptide bonds) and lipids.

Questions

A. Review the Data Tables in Exercises 1 and 2. Compare the results of the Unknown for all tests to the results for the various known samples to determine the identity of the Unknown. Explain the identity of the Unknown using your experiment results in the exercises to help explain and support your answer.

B. Eggs are known to contain cholesterol, which is a lipid. Did your experiment results indicate a presence of lipids in the albumin solution? Think about this result and where cholesterol is present in eggs to explain how your results support or reject cholesterol in eggs. How could you test this? Explain the experiment that you would perform to test this.

Attachment:- Biological Macromolecules.rar

Reference no: EM131711023

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Reviews

inf1711023

4/1/2018 5:05:10 AM

I must say you respond fast. thanks for Delivering my assignment way before the time. I also had difficulties with downloads but the expert was very understanding. Follows directions You wont find better. Thank you, thank you so much.

len1711023

11/8/2017 12:16:59 AM

Note: You may use a graphing program to create the charts or you may draw out and scan in as a pdf file. This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions, diagrams if needed, and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which can be sent to an instructor.

len1711023

11/8/2017 12:16:27 AM

Please complete the attached lab. When using references, please cite in the section the reference is used and include a FULL APA reference. Thank you!Hi all- Here is the rubric for the Week 3Individual Lab POINTS POSSIBLE POINTS EARNED Content +3.0 pt for Exercise 1 Each Table 0.6 Each Question Answer 0.6 +3.0 pt for Exercise 2 Each Table 0.75 Each Question Answer 0.75 Out of 6 Format and Citations +2pt for complete sentences and grammar, references, etc No References = ZERO on ENTIRE assignment Out of 2

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