MIP 616 Exam 1 Multiple Choice, MIP 616 test 1,
MIP616 Exam 1 study 241Questions and Answers with
complete solution(Graded A+)
Amino acid in polypeptides are covalently bound by what type of bond?
a) Peptide
b) protein
c) ester
d) phosphodiester - CORRECT ANSWERS peptide
An alpha helix is what kind of protein structure?
a) secondary
b) primary
c) tertiary
d) quaternary - CORRECT ANSWERS secondary
If you disrupt all hydrogen bonds in a protein, what level will preserved?
a) secondary
b) primary
c) tertiary
d) quaternary - CORRECT ANSWERS primary
Monomeric proteins do not contain a...
a) secondary
b) primary
c) tertiary
d) quaternary - CORRECT ANSWERS quaternary
Which is not part of a zinc finger motif?
a) zinc ion
b) proline residue
c) cysteine residue
,MIP 616 Exam 1 Multiple Choice, MIP 616 test 1,
MIP616 Exam 1 study 241Questions and Answers with
complete solution(Graded A+)
d) histidine residue - CORRECT ANSWERS proline residue
a small molecule that binds directly to the active site of an enzyme and disrupts its
catalytic reaction is called:
a) an allosteric inhibitor
b) a competitive inhibitor
c) a noncompetitive inhibitor
d) RNAi - CORRECT ANSWERS a competitive inhibitor
Which statement about enzymes is TRUE?
a) The catalytic site is responsible for substrate specificity.
b) Reactions catalyzed by enzymes give the products more free energy than
reactions that occur spontaneously.
c) The rate of an enzymatic reaction is always proportional to the concentration of
the substrate
d) Enzymes increase reaction rates by lowering the activation energy needed to
reach the transition state? - CORRECT ANSWERS Enzymes increase reaction
rates by lowering the activation energy needed to reach the transition state?
Which modification marks a protein for degradation in proteasomes?
a) Phosphorylation
b) Ubiquitinoylation
c) acetylation
d) glycosylation - CORRECT ANSWERS ubiquitinoylation
Kinases activates or inactivate many proteins by doing what to them?
a) methylate
b) phosphorylate
c) acetylate
d) digest - CORRECT ANSWERS phosphorylate
,MIP 616 Exam 1 Multiple Choice, MIP 616 test 1,
MIP616 Exam 1 study 241Questions and Answers with
complete solution(Graded A+)
The conversation if inactive chymoptrypsinogen to active chymotryosin is an
example of?
a) proteolytic activation
b) positive cooperativity
c) allostery
d) Ligand induced activation - CORRECT ANSWERS proteolytic activation
Which amino acid can be phosphorylated?
a) lysine
b) serine
c) glycine
d) proline - CORRECT ANSWERS serine
G proteins act as...
a) a catch
b) a branch
c) a switch
d) a notch - CORRECT ANSWERS a switch
what do g proteins do to their bound nucleotide triphosphate?
a) nebulize it
b) hydrolyze it
c) customize it
d) homogenize it - CORRECT ANSWERS hydrolyze it
What kinds of proteins accelerate nucleotide hydrolysis by G proteins?
a) guanine nucleotide exchange factor
, MIP 616 Exam 1 Multiple Choice, MIP 616 test 1,
MIP616 Exam 1 study 241Questions and Answers with
complete solution(Graded A+)
b) GTPase accelerating protein
c) nuclear localization signal proteins
d) nucleoproins - CORRECT ANSWERS GTPase accelerating protein
In two-dimensional gel electrophoresis, proteins are first resolved by... and then by...
a) isoelectric focusing; SDS-PAGE
b) SDA-PAGE; affinity chromatography
c) SDS-PAGE; ion exchange
d) isoelectric focusing; gel filtration - CORRECT ANSWERS Isoelectric
focusing; SDS-PAGE
Gel filtration chromatography separates proteins on the basis of their:
a) charge.
b) mass.
c) affinity for a ligand.
d) shape. - CORRECT ANSWERS mass
Which detergent is used to disrupt protein structure for electrophoretic analysis on
polyacrylamide gels?
a) Tide
b) Triton X-100
c) Nonidet P40 (NP40)
d) Sodium dodecylsulfate (SDS) - CORRECT ANSWERS sodium
dodecylsulfate (SDS)
Tissue is treated to break open each cell's membrane and release the contents, and
then subjected to differential centrifugation. Which of the following is TRUE after
centrifugation?
a) Depending on centrifugation speed, proteasomes are more likely to be in the
supernatant than chaperones.
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