BCH2333 - Final Exam Practice Exam
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University of Ottawa *
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Course
2333
Subject
Chemistry
Date
Dec 6, 2023
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50
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BCH2333 - FINAL EXAM PRACTICE QUESTIONS
Quiz 1
1.
Given the image below, indicate the covalent bond
a.
None of the above
b.
Bond 1 and Bond 2
c.
Unable to determine
d.
Bond 1
e.
Bond 2
2.
Given the image below, indicate the intermolecular bond
a.
None of the above
b.
Bond 1 and Bond 2
c.
Unable to determine
d.
Bond 1
e.
Bond 2
3.
If the pH of a voledronic acid solution is 4.3, and the voledronate concentration is 4mM,
what is the concentration of voledronic acid? (pKa = 5.0)
a.
1.4
b.
379.5
c.
185.2
d.
20
e.
0.5
4.
Which of the following statements about compartmentation is FALSE?
a.
High concentrations of biomolecules can be maintained locally as a result of
compartmentation
b.
By decreasing environmental variability in microdomain, compartmentation
promotes a life
c.
Microdomains form through self-assembly processes, partitioning the cell into
compartments
d.
Compartmentation is necessary to promote the mixing of cellular components
with the bulk environment
e.
Chemical evolution would not possible without compartmentation
5.
The original bond energy of a dipole-induced dipole interaction is 3 kJ/mole. If the
bonding partners change their bond radius by 3.2, what is the new bond energy?
a.
20.31
b.
0.24
c.
0.61
d.
0.01
e.
6.37
6.
Match the chemical structure to the functional group name provided.
5
3
1
4
6
2
a.
Ester
→
1
b.
Amide
→
2
c.
Thiol
→
3
d.
Disulfide
→
4
e.
Phosphodiester
→
5
f.
Amine
→
6
7.
Which of the following indicates an equivalence point of the titration given in the image
below?
a.
Point 1
b.
Region 1
c.
Point 2
d.
Region 2
e.
None of the features indicated
8.
Which of the following indicates a midpoint of the titration given in the image?
a.
Region 2
b.
Point 1
c.
Point 2
d.
Region 1
e.
None of the features indicated
9.
The optimal bond distance in charge-charge interactions is determined by the sum of the
kinetic energies of attraction and repulsion.
a.
True
b.
False
10. Propionic acid is provided (pKa = 2.0) to make a 0.1 M buffer at pH = 2.0. What is the
ratio of proprionate:proprionic acid (round to the nearest whole number): ___1___
What volume of a 1M solution of proprionic acid is required to make 1 L of buffer
(answer in mL, rounded to the nearest whole number): ___10___
11. The Miller-Urey experiment was conducted in order to
…
a.
…
simulate gas exchange from plants that promote life on Earth
b.
…
simulate the surface of a meteorite
c.
…
show that the elevated temperature of primordial Earth initiated life
d.
…
demonstrate that life began with the help of lightning as a source of energy
e.
…
demonstrate that buildings block of the life needed oxygen to form
12. Which of the following statements regarding hydrogen bonding is FALSE?
a.
H-bonding is one of the most important non-covalent bonds in biochemistry
b.
H-bonds occur in assemblies of proteins where individual supramolecular
structure undergo intermolecular interactions
c.
The linear overlap of the anti-bonding orbital of the acceptor lone pair electrons
and the bonding orbital of the donor H is critical to an H-bond
d.
In a H-bond, the donor is a weak acid and the acceptor is a weak base
e.
While an individual H-bond is moderately strong, the presence of groups of
H-bonds contributes to the stability of large biomolecular structures
13. Which of the following statements about the Hydrophobic effect is FALSE?
a.
The formation of a bilayer vesicle from amphiphiles in water results in polar
headgroups facing towards the aqueous phase
b.
Clathrate result in ice-like water, resulting in
Δ
S>0
c.
Reducing the surface area of a clathrate results in an increase in entropy
d.
The hydrophobic effect is a driving force for biochemical self-assembly
e.
The hydrophobic effect is driven by the solvent and is considered a non-covalent
intermolecular interaction
14. What non-covalent interaction(s) is/are most likely to occur between water and water?
a.
Hydrogen bonding and dipole-dipole
b.
Dipole-dipole
c.
Hydrogen bonding
d.
Charge-charge
e.
Charge-dipole
15. Given that the concentration of the hydroxy anion is 10
-2
M, what is the pH of the
resulting solution?
a.
12
b.
2
c.
6
d.
9
e.
4
16. According to the deprotonation reaction shown below, which of the carboxylic acid
species (1 to 4) would you expect to be the least acidic?
a.
2
b.
3
c.
The pKa is equivalent for all carboxylic acids shown
d.
1
e.
4
17. According to the deprotonation reaction shown below, which of the carboxylic acid
species (1 to 4) would you expect to have the highest pKa?
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