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MGG7010- Exam 1 Grossman questions with correct answers
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MGG7010- Exam 1 GrossmanStudy online at https://quizlet.com/_fx7wcz
1. Which of the following is defined as the tertiary struc- Structural do-
ture of a protein? mains such as a
DNA-binding do-
main
2. Monomeric proteins do not contain a: quaternary struc-
ture
3. Which of the following is NOT part of a zinc-finger Proline Residue
motif?
4. There are many important roles for thee dynamic na- Quaternary struc-
ture of proteins in a cell. Which of the following is NOT tures are usually
likely to describe one such reason? very transient (oc-
cur for short peri-
ods of time)
5. You are studying an oligopeptide composed of eight Lysine
amino acids. The four amino acids nearest the C ter-
minus are
nonpolar. The two amino acids nearest the N terminus
are charged. The middle two amino acids are polar.
Which amino
acid is likely to be labeled as number 2?
6. A protein containing several proline residues is: Not likely to form
alpha helices
7. Which of the following is true about protein folding? Elements from the
secondary struc-
tures are main-
tained in the ter-
tiary structures.
8. When comparing domains and structural motifs, Structural do-
which of the following is NOT true? mains appear in
different proteins
with similar func-
tions, while struc-
tural motifs have
, MGG7010- Exam 1 Grossman
Study online at https://quizlet.com/_fx7wcz
been less con-
served over evolu-
tion.
9. You disrupt all hydrogen bonds in a protein. What Primary
level of structure will be preserved?
10. Two proteins that have a similar function: will share similar
amino acids se-
quences if they
are homologs
11. All of the following statements about molecular chap- c. they are found
erones are true EXCEPT: only in mammals
a. they play a role in the proper folding of proteins.
b. they are located in every cellular compartment.
c. they are found only in mammals.
d. they bind a wide range of proteins.
12. Which of the following does NOT impose limits on b. backbone se-
protein folding? quence of the
a. ability of side chains to form hydrogen and ionic polypeptide
bonds
b. backbone sequence of the polypeptide
c. rotations of the planes around the peptide bonds
d. size of side chains
13. Hsp90 family members are present in all organisms a. archaea
EXCEPT:
a. archaea
b. bacteria
c. fungi
d. plants
14. Eggs are protein-rich foods. An uncooked egg can The enzyme be-
catalyze a reaction that breaks down bacterial cell came denatured
walls. After
cooking, this activity is almost abolished. This is like-
ly because:
, MGG7010- Exam 1 Grossman
Study online at https://quizlet.com/_fx7wcz
15. The correct order for molecular chaperone-mediated III, II, I, IV
protein folding is:
I - exchange of ATP for ADP on chaperone
II - chaperone undergoes conformational change,
which affects protein folding
III - chaperone binds to exposed hydrophobic
residues on unfolded protein
IV - folded protein is released
16. All of the following statements about enzymes are d. a single en-
true except: zyme typically re-
a. they function in an aqueous environment. acts with many dif-
b. they lower the activation energy of a reaction. ferent substrates
c. they increase the rate of a reaction.
d. a single enzyme typically reacts with many differ-
ent substrates.
17. The Km for an enzyme-catalyzed reaction: is a measure of
the affinity of the
substrate for the
enzyme
18. For an enzyme-catalyzed reaction, doubling the con- double the Vmax
centration of the enzyme will:
19. A small molecule that binds directly to the active site a competitive in-
of an enzyme and disrupts its catalytic reaction is hibitor
called:
20. Changes in the conformational shape of an enzyme specificity and
that diminish the size of its ligand-binding pocket are affinity
likely to affect an enzyme's:
21. Which of the following is true about enzymes? d. Enzymes in-
a. The catalytic site is responsible for substrate speci- crease reaction
ficity. rates by lowering
b. Reactions catalyzed by enzymes give the products the activation en-
more free energy than reactions that occur sponta- ergy needed to
neously. reach the transi-
c. The rate of an enzymatic reaction is always propor- tion state
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