BCH 361 CH 2 EXAM QUESTIONS WITH ALL CORRECT ANSWERS
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BCH 361 CH 2
BCH 361 CH 2 EXAM QUESTIONS WITH ALL CORRECT ANSWERS
Under appropriate conditions, protein folding proceeds:
a) amphipathically.
b) due to the hydrophobic effect.
c) spontaneously.
d) both amphipathically and due to the hydrophobic effect.
e) both spontaneously and due to the hydrophobic e...
BCH 361 CH 2 EXAM QUESTIONS
WITH ALL CORRECT ANSWERS
Under appropriate conditions, protein folding proceeds:
a) amphipathically.
b) due to the hydrophobic effect.
c) spontaneously.
d) both amphipathically and due to the hydrophobic effect.
e) both spontaneously and due to the hydrophobic effect - Answer-e
You have a mixture of proteins with the following pKa's. Which of the statements below
is TRUE?
Protein X pKa = 2
Protein Y pKa = 6
Protein Z pKa = 10
a) At a pH of 6, protein Y will be 50% protonated and 50% deprotonated.
b) At a pH of 8, protein Y will be more protonated than protein Z.
c) At a pH of 6, the solution of protein X will contain more hydrogen ions than the
solution of protein Z. - Answer-a
Nonpolar solute molecules are driven together in water not primarily because they have
a high affinity for each other, but because, when they do associate, they release water
molecules. This association is called the _____. - Answer-Hydrophobic Effect
Which of the following has the lowest Ka?
a) bicarbonate
b) carbonic acid
c) dihydrogen phosphate
d) phosphoric acid
e) acetic acid - Answer-a
Which of the following is dependent on Brownian motion?
a) signal molecules diffusing from site of origin to site of effect
b) an enzyme finding a substrate
c) exchange of metabolites
d) All - Answer-d
, Two amino acids are near each other in a protein structure. Both amino acids are
alanine, the structure of which contains a methyl group. Which of the following
statements regarding the interaction of the two alanine amino acids is CORRECT?
a) The amino acids will follow Coulomb's law.
b) The amino acids may experience van der Waals interactions.
c) One alanine will donate a hydrogen atom to the other, therefore forming a hydrogen
bond.
d) Although no hydrogen donation will occur, a hydrogen bond will still form. - Answer-b
The formation of a phospholipid bilayer:
a) relies on the amphipathic nature of the phospholipids.
b) depends on the hydrophobic effect.
c) is an ordered event and therefore does not follow the Second Law of
Thermodynamics.
d) relies on the amphipathic nature of the phospholipids and also depends on the
hydrophobic effect. - Answer-d
You prepare a solution with a proton concentration of 8.0 x 10—5 M. What is the
concentration of hydroxide ion [OH—] in the solution?
a) 8.0 x 10^—5 M
b) 6.0 x 10^—5 M
c) 1.25 x 10^—10 M
d) 4.09 M
e) 8.0 x 10^9 M - Answer-c
Acetone contains which functional group(s)?
a) amino
b) aldehyde
c) carboxyl
d) hydroxyl
e) keto - Answer-e
The amino acid cysteine belongs to which functional group(s)?
a) sulfhydryl
b) amino
c) carboxyl - Answer-a
A group of atoms with distinct chemical properties is called a _____ group. - Answer-
Functional
Brownian motion is due to:
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