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CHEMISTRY 1152
EXAM 3A - Key
Fall, 2014
Kirberger
NAME______________________________
All notes, books, etc., must be placed out of sight. Please read each of the problems carefully. If
something is not clear, please ask.
The exam consists of a total of 108 points. Make sure your exam is complete.
Please record all of your answers in the correct spaces on your scantron sheet using a number 2
pencil. Make sure that your scantron is properly labelled with your name, test number, and test
version (A or B).
Please note that you may not leave the room for any reason once you have started the exam. If
you have to leave early, you must submit your exam before you leave. You will not be allowed to
return to finish the exam once it has been submitted. Good Luck!!!
Chemistry 1152
Exam 3A
Name ___________________________ 2
1. (3 points) Which of the following amines can form hydrogen bonds with water?
a. primary and secondary
b. just tertiary
c. all three (primary, secondary and tertiary)
d. none of the aminos
ANS: A
2. (3 points) Some amine drugs are administered in the form of salts in order to
a. make them form into pills more easily
b. make them taste better
c. make them more basic
d. make them more soluble in body fluids
ANS: D
3. (3 points) Which of the following compounds is most likely to behave like adrenaline?
a.
b.
c.
d.
ANS: B
4. (3 points) Fatty acids usually have ____.
a. an odd number of carbon atoms
b. an even number of carbon atoms
c. an odd number of oxygen atoms
d. an odd number of oxygen atoms and an odd number of carbon atoms
Chemistry 1152
Exam 3A
Name ___________________________ 3
ANS: B
5. (3 points) Phosphoglycerides differ from glycerides in that one of the hydroxyl groups of glycerol is esterified with
a. phosphoric acid
b. Phosphorus
c. Choline
d. Serine
ANS: A
6. (3 points) Which of the following hormones is an anabolic steroid?
a. Estrogen
b. Testosterone
c. Progesterone
d. Estradiol
ANS: B
7. (3 points) Lipid oils are usually obtained from
a. plant sources
b. animal sources
c. both plant and animal sources
d. neither plant nor animal sources
ANS: A
8. (3 points) One feature of the fluid mosaic model of membrane structure is called the
a. Microfilament
b. pleated sheet
c. hydrophilic sheet
d. lipid bilayer
ANS: D
9. (3 points) Which of the following are male sex hormones?
a. Androgens
b. Estrogens
c. Progesterones
d. Estrones
ANS: A
10. (3 points) A functional group present in fats is a(n)
a. alcohol
b. Ester
c. carboxylic acid
d. aldehyde
ANS: B
11. (3 points) The main function of bile salts is to
a. stimulate the absorption of minerals through the intestinal wall
b. provide a pathway for lowering cholesterol levels
Chemistry 1152
c.
d.
Exam 3A
Name ___________________________ 4
emulsify lipids in the digestive tract
serve as hormonal agents in the digestive process
ANS: C
12. (3 points) A β (beta) sheet structure is an example of ____ protein structure.
a. primary
b. secondary
c. tertiary
d. quaternary
ANS: B
13. (3 points) A side chain (R group) of an amino acid containing CH2OH would be classified as
a. Acidic
b. Basic
c. neutral and nonpolar
d. neutral and polar
ANS: D
14. (3 points) The correct 3 letter code for the amino acid isoleucine would be:
a. Iso
b. Isl
c. Ile
d. None of the above
ANS: C
15. (3 points) If the following compound were completely hydrolyzed, how many amino acids could be produced?
a.
b.
3
4
c.
d.
5
6
ANS: B
16. (3 points) The association of several protein chains into a larger structure as in the case of hemoglobin is an example
of ____ structure.
a. primary
b. secondary
c. tertiary
d. quaternary
Chemistry 1152
Exam 3A
Name ___________________________ 5
ANS: D
17. (3 points) In proteins, tertiary structure may be stabilized by the formation of ____________ between 2 Cys
residues.
a. Hydrogen bonds
b. Ionic bonds
c. Disulfide bonds
d. Hydrophobic interactions
ANS: C
18. (3 points) Which of the following is a function of proteins?
a. catalytic
b. protective
c. storage
d. all of these
ANS: D
19. (3 points) In proteins, tertiary structure may be stabilized by the formation of a salt bridge between residues ____
and _____.
a. Asp and Lys
b. Glu and Ile
c. Ser and Tyr
d. Phe and Asn
ANS: A
20. (3 points) Proteins tend to fold so that the ________ residues are buried in the interior of the protein, while the
_________ and __________ residues are found on the surface.
a. acidic, small, neutral
b. non-polar, hydrophobic, polar charged
c. polar neutral, polar charged, zwitterions
d. non-polar, polar neutral, polar charged
ANS: D
21. (3 points) The protein responsible for the mechanical strength of skin in mammals is?
a. collagen
b. keratin
c. hemoglobin
d. myosin
ANS: A
22. (3 points) Glycoproteins are a combination of protein and
a. Lipids
b. Carbohydrates
c. nucleic acids
d. Steroids
ANS: B
Chemistry 1152
Exam 3A
Name ___________________________ 6
23. (3 points) The sequence of amino acids in a protein is called the ____ structure.
a. primary
b. secondary
c. tertiary
d. quaternary
ANS: A
24. (3 points) Identify the structure corresponding to N,2-dimethylaniline:
NH
a.
NH
c.
b.
d. None of these
NH
ANS: C
25. (3 points) Identify the structure corresponding to N-ethyl-3-methylbutan-1-amine:
a.
c.
NH
NH
b.
d. None of these
NH
ANS: A
26. (3 points) Identify the structure corresponding to 4-chloro-3-methyl-N-propylbutanamide
a.
NH
Cl
O
NH
O
b.
c.
NH
Cl
d. None of these
O
ANS: D
27. (3 points) Provide the correct name of the following compound:
Chemistry 1152
Exam 3A
Name ___________________________ 7
O
NH
Br
a.
b.
c.
d.
4-bromo-3-methyl-N-ethylpentanamide
2-bromo-3-methyl-N-propylpentanamide
2-bromo-3-methyl-1-oxo-propanamide
None of the above
ANS: B
28. (3 points) Provide the correct name of the following compound:
NH2
a.
b.
c.
d.
3-phenylheptan-2-amine
1-pentyl-1-propylaniline
1-methyl-2-phenylhexanamine
None of the above
ANS: A
29. (3 points) Provide the correct name of the following compound:
Br
a.
b.
c.
d.
NH2
3-bromopentan-2-amine
2-bromopentan-4-amine
4-bromopentanamine
None of the above
ANS: D
30. (3 points) Provide the correct name of the following compound:
Br
N
a.
b.
c.
d.
N-bromo-N-methyl-4-ethylaniline
N-bromo-(p-propylphenyl)methanamine
N-bromo-4-ethyl-N-methylaniline
None of the above
Chemistry 1152
Exam 3A
Name ___________________________ 8
ANS: C
31. (3 points) Provide the correct name of the following compound:
O
NH
a.
b.
c.
d.
N-butylpropanamide
N-propylbutanamide
3-oxo-4-nitrooctanamide
None of the above
ANS: A
32. (3 points) The name of the amide product that would result from the following reaction is N-ethylethanamide.
O
H3C
a.
b.
c.
d.
O
O
CH3
+
CH3
H2N
True
False
No reaction occurs
Answering this question is a violation of my constitutional rights
ANS: A
33. (3 points) The major product that would result from the following reaction is:
O
H3C
NH2
a.
+
HO H
+
HCl
Heat
c.
O
O
O
-
b.
+
NH3
d. None of these
O
OH
ANS: B
34. (3 points) The major product that would result from the following reaction is:
Chemistry 1152
O
Exam 3A
O
H3C
O
CH3
Name ___________________________ 9
H3C
+
CH3
No Rxn
N
H3C
O
a.
+
N
O
b.
N
c.
No reaction occurs
d.
None of the above
ANS: C
35. (3 points) The name of the amine that would appear in following reaction is:
O
O
+
Cl
a.
b.
c.
d.
N
amine
Propanamine
N-methylethanamine
N,N-dimethylethanamine
No reaction occurs
ANS: B
36. (3 points) Identify the final products that would result from the following reaction:
O
H3C
NH
a.
O
+
-
+
O Na
H3C
b.
CH3
Na OH
+
H3C NH2
O
OH
+
H3C NH2
Heat
+
HCl
Chemistry 1152
c.
O
OH
d.
None of the above
ANS: A
Exam 3A
Name ___________________________ 10