All of the following pairs are well-match, except one:O Addition of Tubulin dimers occurs more quickly at the plus ends of MicrotubulesO Plateau phase : subunits are added and removed from MTs at equal rates.O Elongation phase: MTs grow slowlyO lag phase : period of nucleation.PageBackNext All of the following pairs are well-match, except one:O Addition of Tubulin dimers occurs more quickly at the plus ends of MicrotubulesO Plateau phase : subunits are added and removed from MTs at equal rates.O Elongation phase: MTs grow slowlyO lag phase : period of nucleation.PageBackNext

Microtubules are dynamic structures that are constantly being polymerized and depolymerized. The…

All of the following pairs are well-match, except one: O Addition of Tubulin dimers occurs more quickly at the plus ends of Microtubules O Plateau phase : subunits are added and removed from MTs at equal rates. O Elongation phase: MTs grow slowly O lag phase : period of nucleation.

All of the following pairs are well-match, except one: O Addition of Tubulin dimers occurs more quickly at the plus ends of Microtubules O Plateau phase : subunits are added and removed from MTs at equal rates. O Elongation phase: MTs grow slowly O lag phase : period of nucleation.

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter10: Cell Reproduction

Section: Chapter Questions

Problem 27RQ: FtsZ proteins direct the formation of a ___________ that will eventually form the new cell walls of...

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All of the following pairs are well-match, except one:
O Addition of Tubulin dimers occurs more quickly at the plus ends of Microtubules
O Plateau phase : subunits are added and removed from MTs at equal rates.
O Elongation phase: MTs grow slowly
O lag phase : period of nucleation.
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Clear selec All of the following pairs are well-match, except one: O Addition of Tubulin dimers occurs more quickly at the plus ends of Microtubules O Plateau phase : subunits are added and removed from MTs at equal rates. O Elongation phase: MTs grow slowly O lag phase : period of nucleation.
A solution of pure αβ-tubulin dimers is thought tonucleate microtubules by forming a linear protofilamentabout seven dimers in length. At that point, the probabili-ties that the next αβ-dimer will bind laterally or to the endof the protofilament are about equal. The critical eventfor microtubule formation is thought to be the first lateralassociation (Figure Q16–2). How does lateral associationpromote the subsequent rapid formation of a microtu-bule?
Suppose you have just polymerized microtubules from a 1ml solution of tubulin subunits in vitro and the reaction has reached steady state. What do you expect would happen if you then diluted the microtubule solution into a 10ml pool of buffer (that does not contain any additional protein)? O microtubule stabilization O microtubule growth O microtubule shrinkage microtubule severing O microtubule degradation by proteases
Where are most y-tubulin ring complexes found? O Centriole. O Centromere. O Cohesin. O Centrosome matrix.
One of the followings is a protein that stabilizes plus ends, decreasing the likelihood of subunit loss of microtubules O +end TIP Tau Таxol catastrophin
Microtubules both in vitro and in vivo undergo dynamic instability, and this type of assembly is thought to be intrinsic to the microtubule. What is the current model that accounts for dynamic instability?
Certain cellular components appear to move bidirectionally on microtubules. Describe how this is possible given that microtubule orientation is fixed by the MTOC.
Microtubule polymerization is fastest: O All are correct O In presence of Thymosin B4 In presence of GTP In presence of catastrophine
What does it usually mean when a microtubule has a GTP cap? O The microtubule has a ring of GTP added onto its plus end that acts to stabilize this end and prevent dynamic instability. O The microtubule has alpha and beta tubulin, both bound to GTP, at the plus end. The microtubule has alpha tubulin bound to GDP and beta tubulin bound to GTP at the plus end. O The microtubule is radiating from the MTOC where the minus ends are stabilized.
Microtubules in an animal cell: O a. undergo assembly if the concentration of GTP-bound tubulin dimers is high and a cell is exposed to vinblastine O b. undergo disassembly if the concentration of GDP-bound tubulin dimers is high and a cell is exposed to taxol O c. undergo disassembly if the concentration of GTP-bound tubulin dimers is high and a cell is exposed to colchicine O d. undergo assembly if the concentration of GTP-bound tubulin dimers is high and a cell is exposed to colchicine
What determines the conformation of Mediator? TAND 1 O TAFS 6 and 9 O interactions with transactivator proteins O cyclin H O the phosphorylation state of the CTD
At 1.4 mg/mL pure tubulin, microtubules grow ata rate of about 2 μm/min. At this growth rate, how manyαβ-tubulin dimers (8 nm in length) are added to the endsof a microtubule each second?