1 Stathmin and Profilin are similar because ____.
a) Stathmin and Profilin are necessary to form branched actin filaments
b) Stathmin is necessary for nucleation of microtubules as Profilin is necessary for forming straight unbranched actin filaments
c) Stathmin is used to sequester free tubulin subunits as Profilin is used to sequester free actin monomers
d) Stathmin and Profilin are motor proteins
2 Which of the following statements regarding dynamic instability is FALSE?
a) Dynamic instability is required for both actin and microtubule function.
b) The GTP cap helps protect a growing microtubule form depolymerization.
c) GTP hydrolysis by the tubulin dimer promotes microtubule shrinking.
d) Cap proteins help stabilize the microtubules, promoting microtubule growth.
3. Which of the following statements about vesicular membrane fusion is TRUE?
a) Membrane fusion does not always immediately follow vesicle docking.
b) The interactions of the v-SNAREs and t-SNAREs pull the vesicle membrane and the target organelle together so that their lipids can intermix.
c) NSF and SNAP disassemble the SNARE complex so the SNAREs can be recycled.
d) All of the above are true.
1 Stathmin and Profilin are similar because ____.
a) Stathmin and Profilin are necessary to form branched actin filaments
b) Stathmin is necessary for nucleation of microtubules as Profilin is necessary for forming straight unbranched actin filaments
c) Stathmin is used to sequester free tubulin subunits as Profilin is used to sequester free actin monomers
d) Stathmin and Profilin are motor proteins
2 Which of the following statements regarding dynamic instability is FALSE?
a) Dynamic instability is required for both actin and microtubule function.
b) The GTP cap helps protect a growing microtubule form depolymerization.
c) GTP hydrolysis by the tubulin dimer promotes microtubule shrinking.
d) Cap proteins help stabilize the microtubules, promoting microtubule growth.
3. Which of the following statements about vesicular membrane fusion is TRUE?
a) Membrane fusion does not always immediately follow vesicle docking.
b) The interactions of the v-SNAREs and t-SNAREs pull the vesicle membrane and the target organelle together so that their lipids can intermix.
c) NSF and SNAP disassemble the SNARE complex so the SNAREs can be recycled.
d) All of the above are true.
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