Final Exam - BioChem (1,3,6,7,10)
Two Amino acids of the stranded 20 contain sulfur atoms..
methionine and cysteine
3 multiple choice options
amino acids are ampholytes becuase they can function as either a(n):
acid or base
3 multiple choice options
Titration of valine by a strong base, for example NaOH, reveals two pk's. The titration
reaction occuring at pk2 (pk2 = 9.62)
-NH3+ + OH- -----> -NH2 + H2O
Pick the odd amino acid out
Tyrosine
3 multiple choice options
One of the following has the functional group called functional guanidinium group
Arginine
3 multiple choice options
Amino Acids, when dissolved in water, become zwitterions because
they have an acidic group that stays deprotonated (or becomes deprotonated) at
pH=7 and a basic group that stays Protonated (or becomes protonated) at pH=7
3 multiple choice options
This amino acid in the diagram below has:
3 Iniozable groups
3 multiple choice options
The following graph represent the titration curve of:
Histidine
3 multiple choice options
Prosthetic groups in the class of proteins known as glycoproteins are composed of:
carbohydrates
3 multiple choice options
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which should elute second in size-exclusion (gel filtration) chromatography?
immunoglobin G M1= 145,000
, 3 multiple choice options
By adding SDS (sodium dodecyl sulfate) during the electrophoresis of proteins, it is
possible to:
determine a protein's isoelectric point
3 multiple choice options
The term specific activity differs from the term activity in that specific activity:
is measured only under optimal conditions
3 multiple choice options
At what pH will this amino acid migrate effectively towards a negative electrode?
pH ≤ 2.82
3 multiple choice options
A Biochemist is attempting to separate a DNA-binding protein (protein X) from other
proteins in a solution. Only three other proteins (A, B, and C) are present. The
proteins have the following properties:
What type of protein separation techniques might she use to separate protein X from
protein A?
Size-exclusion (gel filtration) chromatography to separate on the basis of size
3 multiple choice options
A Biochemist is attempting to separate a DNA-binding protein (protein X) from other
proteins in a solution. Only three other proteins (A, B, and C) are present. The
proteins have the following properties:
What type of protein separation techniques might she use to separate protein X from
protein B?
ion-exchange chromatography or isoelectric focusing to separate on the basis of
charge
3 multiple choice options
A Biochemist is attempting to separate a DNA-binding protein (protein X) from other
proteins in a solution. Only three other proteins (A, B, and C) are present. The
proteins have the following properties:
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