5. Analysis of Macromolecules in Unknown Solution Record your results in Table 2.11. Based on the results, you will suggest their identity: reducing sugars, starch, protein, nucleic acid, or lipid. The unknowns are labeled A, B, C, and D. Before you test each unknown, develop your hypotheses regarding what results you expect to get for each of the four possible substances. Unknown A B C D Table 2.11. Chemical testing to identify an unknown. lodine Test Biuret Test Benedict's Test Sudan III Test Unknown Identity

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Chapter11: The Great Communicator
Section: Chapter Questions
Problem 14MC
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Answer Question 5 and fill the table

-
2
~M. JnO
N
1 = distilled water; 2 = egg albumin; 3 = starch; 4 = chicken broth.
3. Add three drops of Biuret reagent to each tube and gently shake to mix.
4. Record your results in Table 2.5, then answer the questions that follow.
Test tube
1. Distilled water
2. Egg albumin
3. Starch
4. Chicken broth
5 Unknown't A
6. Ununown B
Table 2.5. Biuret test.
Color
blue
violet
blue
Dark violet
Positive or Negative?
blue
brownish yellow
44 Basic Chemistry: Chemical Composition of Cells | Lab Exercise 2
+
+A+
Transcribed Image Text:- 2 ~M. JnO N 1 = distilled water; 2 = egg albumin; 3 = starch; 4 = chicken broth. 3. Add three drops of Biuret reagent to each tube and gently shake to mix. 4. Record your results in Table 2.5, then answer the questions that follow. Test tube 1. Distilled water 2. Egg albumin 3. Starch 4. Chicken broth 5 Unknown't A 6. Ununown B Table 2.5. Biuret test. Color blue violet blue Dark violet Positive or Negative? blue brownish yellow 44 Basic Chemistry: Chemical Composition of Cells | Lab Exercise 2 + +A+
proton donors.
5. Analysis of Macromolecules in Unknown Solution
Record your results in Table 2.11. Based on the results, you will suggest their identity: reducing
sugars, starch, protein, nucleic acid, or lipid. The unknowns are labeled A, B, C, and D. Before you
test each unknown, develop your hypotheses regarding what results you expect to get for each
of the four possible substances.
Unknown
A
B
C
D
Table 2.11. Chemical testing to identify an unknown.
lodine
Test
Biuret
Test
Benedict's
Test
Sudan III
Test
dwuotant ta
Unknown
Identity
6. Analysis of Buffers in Unknown Solutions
Imagine that you are given three different solutions: unknown A, B, and C. One of the solutions
is a buffer, the other two are not. The following supplies will be available to you: test tubes,
Uring the materials provided, how
Transcribed Image Text:proton donors. 5. Analysis of Macromolecules in Unknown Solution Record your results in Table 2.11. Based on the results, you will suggest their identity: reducing sugars, starch, protein, nucleic acid, or lipid. The unknowns are labeled A, B, C, and D. Before you test each unknown, develop your hypotheses regarding what results you expect to get for each of the four possible substances. Unknown A B C D Table 2.11. Chemical testing to identify an unknown. lodine Test Biuret Test Benedict's Test Sudan III Test dwuotant ta Unknown Identity 6. Analysis of Buffers in Unknown Solutions Imagine that you are given three different solutions: unknown A, B, and C. One of the solutions is a buffer, the other two are not. The following supplies will be available to you: test tubes, Uring the materials provided, how
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