Biochemistry A Short Course First Edition by John L. Tymoczko - Test Bank
Chapter 2 Water,
Weak Bonds, and the Generation of Order Out of Chaos
Matching Questions
Use the following
to answer questions 1–10:
Choose the
correct answer from the list below. Not all of the answers will be used.
a) ionic bonds or
salt bridges
b) Brownian
motion
c) hydrophobic
d) hydrogen
e) polar
f) nonpolar
g) van der Waals
h) entropy
i) ion product of
water
j) amphipathic
k) positive
l) dielectric
constant
m) negative
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1. |
____________:
The type of bond found between an oxygen on one water molecule and hydrogen
on a different water molecule. |
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|
Ans: |
d |
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Section:
2.2 |
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2. |
Movement
of particles due to the random fluctuations of energy content of the
environment is known as ____________. |
|
|
Ans: |
b |
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Section:
2.1 |
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3. |
Electrostatic
interactions between atoms with opposite electrical charges are also called ____________.
|
|
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Ans: |
a |
|
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Section:
2.3 |
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4. |
Water
weakens the electrostatic interaction of ions due to its high ____________. |
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Ans: |
l |
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Section:
2.3 |
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5. |
The
distance when two atoms no longer repulse each other yet have the strongest
attraction is known as the____________
contact distance. |
|
|
Ans: |
g |
|
|
Section: 2.3 |
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6. |
____________:
Thermodynamic force that drives hydrophobic interactions. |
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Ans: |
h |
|
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Section:
2.4 |
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7. |
____________: A molecule with two
distinctive chemical properties or characteristics. |
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Ans: |
j |
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Section:
2.4 |
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8. |
Which
type of amino acid is responsible for increasing entropy as a protein folds? |
|
|
Ans: |
f |
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|
Section:
2.4 |
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9. |
____________:
The charge on acetic acid when the pH is more than one pH unit above the pKa. |
|
|
Ans: |
m |
|
|
Section:
2.5 |
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10. |
____________:
The charge of an amino group when the pH is one pH unit below the pKa. |
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|
Ans: |
k |
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Section:
2.5 |
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Fill-in-the-Blank Questions
|
11. |
Molecules
that are readily soluble in water are considered . |
|
Ans:
polar Section 2.2 |
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12. |
The
force that is quantified by Coulomb’s law is called . |
|
Ans:
ionic or electrostatic interaction Section
2.3 |
|
13. |
A
solvent with a low dielectric constant would be a solvent for salts. |
|
Ans:
poor Section 2.3 |
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14. |
The
transient force, which while weak, still has a large impact on how
macromolecules interact is the . |
|
Ans:
van der Waals interaction Section
2.3 |
|
15. |
Hydrophobic
molecules are driven together by , not because
they have an affinity for each other. |
|
Ans:
entropy Section 2.4 |
|
16. |
Lipids
that interact with both the water and the hydrophobic regions of the membrane
are considered . |
|
Ans:
amphipathic Section 2.4 |
|
17. |
An
acid ionizes to form a proton and its . |
|
Ans:
base or conjugate base Section 2.5 |
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