BIOL 150 Lab 2 Assignment

Data Sheet: Activity – Biomolecules

NameCourseDate
   

Activity Data Code      

Procedure I – Group 1: Known Sample Solutions

Complete the table below using your data from Procedure I. For each sample solution (A-E) indicate any color change that occurs when a test solution is added. Fill in the last column (Biomolecule Classification) using data found under the Activity Form tab.

Data Table I

Sample SolutionTest Solution 1 ReactionTest Solution 2 ReactionTest Solution 3 ReactionTest Solution 4 ReactionTest Solution 5 ReactionBiomolecule Classification
A      
B      
C      
D      
E      

Observations and Questions

[1] Write a hypothesis statement for the experiment you conducted for Procedure I.

[2] Which variable represents the independent variable? What information helped you to come to that decision?

[3] Would you characterize this experiment as qualitative or quantitative? What information helped you to come to that decision?

[4] Refer to your completed Data Table I and place the appropriate answer to each of the statements below.

Answers: amino acid, starch, fat, sugar or starch, protein or amino acid

Statements:

Test Solution 1 reacts with:

Test Solution 2 reacts with:

Test Solution 3 reacts with:

Test Solution 4 reacts with:

Test Solution 5 reacts with:

Procedure II – Group 2: Unknown Sample Solutions

Complete the table below using your data from Procedure II. For each sample solution (A-E) indicate any color change that occurs when a test solution is added. Next, use Data Table I to determine the biomolecule classification for each sample solution.  Hint: compare the color changes in both tables to make your determinations.

Data Table II

Sample SolutionTest Solution 1 ReactionTest Solution 2 ReactionTest Solution 3 ReactionTest Solution 4 ReactionTest Solution 5 ReactionBiomolecule Classification
A      
B      
C      
D      
E      

Observations and Questions

[5] In Procedure II, did any of your unknown sample solutions (A, B, C, D, E) contain sugars? If yes, which one? What information helped you to come to that decision?

[6] In Procedure II, did any of your unknown sample solutions (A, B, C, D, E) contain protein? If yes, which one? What information helped you to come to that decision?

[7] Using the laboratory tests in this experiment, would you be able to distinguish between a small molecule such as amino acid from a larger molecule such as a protein? Explain why or why not.

[8] Using the laboratory tests in this experiment, would you be able to distinguish between a starch and a sugar such as glucose? Explain why or why not.

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