MCB 252 FINAL EXAM AND STUDY GUIDE NEWEST 2026
TEST BANK| COMPLETE EXAM QUESTIONS AND CORRECT
VERIFIED ANSWERS/ ALREADY GRADED A+| MCB 252
FINAL EXAM
Microtubules are:
A. non-polar.
B. polar.
B
Tubulin hydrolyses which nucleotide?
A. ATP.
B. UTP.
C. TTP.
D. GTP.
E. CTP.
D
Which of the following proteins binds to the GTP cap and stabilizes that
cap?
A. MAP2.
pg. 1
,B. Kinesin-13.
C. EB1.
D. All of the above.
C
Which type of reaction best describes microtubules that are undergoing
dynamic instability in vitro- steady state or equilibrium (assuming GTP is
always available)?
A. Equilibrium.
B. Steady state.
B
γ-TURC plays a role in which of the following processes?
A. Nucleation of microtubules.
B. Capping of the plus end of microtubules.
C. Elongation of microtubules.
D. B and C.
E. All of the above.
A
Which of the following statements is/are TRUE and which is/are FALSE?
pg. 2
,i. As discussed in lecture, microtubules that are anchored in a
centrosome are nucleated by and are extensions of the microtubules
that comprise the centrioles.
ii. As discussed in lecture, it takes greater than 1 full cell cycle for a
centriole to mature from being "born" (or its initial formation) until it
matures into a fully functional mother centriole.
A. i is TRUE, ii is FALSE.
B. Both i and ii are FALSE.
C. i is FALSE, ii is TRUE.
D. Both i and ii are TRUE.
C
Within a centrosome the two centrioles are identical to each other.
A. True
B. False
B
You place a centrosome in a test tube that is a square plastic box the
size of a cell. You add tubulin and GTP so that microtubules can be
nucleated by the centrosome and be assembled in vitro. You initially
place the centrosome in the lower right corner of your test tube box.
Once microtubules have assembled to steady state where will your
centrosome be located?
pg. 3
, A. In the center of your test tube box.
B. In the lower left corner of your test tube box.
C. In the lower right corner of your test tube box.
D. In the upper left corner of your test tube box.
E. In the upper right corner of your test tube box.
A
In which part of dynein is the microtubule binding site located?
A. The stem
B. The stalk
C. The head
D. None of the above
B
In which part of dynein is the ATPase activity located?
A. The stalk
B. The head
C. The stem
D. None of the above
B
pg. 4
TEST BANK| COMPLETE EXAM QUESTIONS AND CORRECT
VERIFIED ANSWERS/ ALREADY GRADED A+| MCB 252
FINAL EXAM
Microtubules are:
A. non-polar.
B. polar.
B
Tubulin hydrolyses which nucleotide?
A. ATP.
B. UTP.
C. TTP.
D. GTP.
E. CTP.
D
Which of the following proteins binds to the GTP cap and stabilizes that
cap?
A. MAP2.
pg. 1
,B. Kinesin-13.
C. EB1.
D. All of the above.
C
Which type of reaction best describes microtubules that are undergoing
dynamic instability in vitro- steady state or equilibrium (assuming GTP is
always available)?
A. Equilibrium.
B. Steady state.
B
γ-TURC plays a role in which of the following processes?
A. Nucleation of microtubules.
B. Capping of the plus end of microtubules.
C. Elongation of microtubules.
D. B and C.
E. All of the above.
A
Which of the following statements is/are TRUE and which is/are FALSE?
pg. 2
,i. As discussed in lecture, microtubules that are anchored in a
centrosome are nucleated by and are extensions of the microtubules
that comprise the centrioles.
ii. As discussed in lecture, it takes greater than 1 full cell cycle for a
centriole to mature from being "born" (or its initial formation) until it
matures into a fully functional mother centriole.
A. i is TRUE, ii is FALSE.
B. Both i and ii are FALSE.
C. i is FALSE, ii is TRUE.
D. Both i and ii are TRUE.
C
Within a centrosome the two centrioles are identical to each other.
A. True
B. False
B
You place a centrosome in a test tube that is a square plastic box the
size of a cell. You add tubulin and GTP so that microtubules can be
nucleated by the centrosome and be assembled in vitro. You initially
place the centrosome in the lower right corner of your test tube box.
Once microtubules have assembled to steady state where will your
centrosome be located?
pg. 3
, A. In the center of your test tube box.
B. In the lower left corner of your test tube box.
C. In the lower right corner of your test tube box.
D. In the upper left corner of your test tube box.
E. In the upper right corner of your test tube box.
A
In which part of dynein is the microtubule binding site located?
A. The stem
B. The stalk
C. The head
D. None of the above
B
In which part of dynein is the ATPase activity located?
A. The stalk
B. The head
C. The stem
D. None of the above
B
pg. 4
