MCB LON CAPA FINAL EXAM WITH GUARANTEED ACCURATE ANSWERS |VERIFIED
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Module
MCB LON CAPA
Institution
MCB LON CAPA
The figure above is a cartoon of the plus end of an individual microtubule. Based on our discussion in lecture, which of the following statements is correct? - ACCURATE ANSWERS The plus end is shrinking.
True or False: The two ends of a microtubule that is growing in vitro (with neither end capp...
MCB LON CAPA FINAL EXAM
MCB LON CAPA FINAL EXAM WITH GUARANTEED ACCURATE ANSWERS |VERIFIED
The figure above is a cartoon of the plus end of an individual
microtubule. Based on our discussion in lecture, which of the following
statements is correct? - ACCURATE ANSWERS✔✔ The plus end is
shrinking.
True or False: The two ends of a microtubule that is growing in vitro
(with neither end capped) have different critical concentrations. -
ACCURATE ANSWERS✔✔ True.
Which of the following is/are MAPs?
Protein(s) that bind the GTP cap and promote assembly of microtubules
Proteins that promote bending of proto-filaments and promote
disassembly of microtubules
, Proteins that bind the sides of microtubules and connect to other proteins
such as intermediate filament
Protein(s) that bind the GTP cap and promote assembly of microtubules,
and proteins that bind the sides of microtubules and connect to other
proteins such as intermediate filaments
All of the above - ACCURATE ANSWERS✔✔ All of the above
True or False: As described in lecture, microtubule assembly is best
described as an equilibrium reaction rather than a steady state reaction. -
ACCURATE ANSWERS✔✔ False.
True or False: As discussed in lecture, there are no known motor
proteins that move along intermediate filaments. - ACCURATE
ANSWERS✔✔ True.
By measuring microtubule growth, you find that they grow at a rate of 3
μm/min (this number has been altered to make the following calculation
easier). At this growth rate, approximately how many alpha/beta tubulin
dimers (8 nm in length) are added to the ends of a microtubule each
second (don't forget there are 13 protofilaments/microtubule)? -
ACCURATE ANSWERS✔✔ 3000 nm/60 sec = 50 nm/sec x dimer/8
nm = ~6 dimers/sec to each of 13 protofilaments = 78 tubulin dimers
added per second.
Dynamic instability causes microtubules to grow and shrink rapidly.
Consider a microtubule that is in its shrinking phase. Why is it
shrinking, and what must happen at the end of the microtubule for it to
stop shrinking and start growing? - ACCURATE ANSWERS✔✔ A
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