A) in the hollow core of the microtubule.
B) at the microtubule (−) end.
C) at the microtubule (+) end.
D) along the outer wall of the microtubule.
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A) They are named based on their location in cells between actin microfilaments and microtubules.
B) All cells express the same class II cytoplasmic intermediate filament proteins.
C) Staggered,antiparallel tetramers give intermediate filaments strength.
D) Acidic and basic keratins provide dynamic paths on which organelles may travel.
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A) sliding movement of central pair microtubules.
B) contraction of central pair microtubules.
C) sliding movement of outer doublet microtubules.
D) contraction of outer doublet microtubules.
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In most cells,microtubules ori...View Answer
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A) connect the spindle poles.
B) attach chromosomes to the spindle.
C) carry out cytokinesis.
D) anchor the spindle poles to the plasma membrane.
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A) centrioles.
B) γ-tubulin.
C) GDP-tubulin dimers.
D) basal bodies.
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A) The spindle elongates.
B) Kinetochores remain attached to shortening kinetochore microtubules.
C) Chromosomes move to the spindle equator.
D) The spindle poles move closer together.
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Cdc42 activation at the front of the cel...View Answer
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A) lateral association of only γ-tubulin subunits.
B) head-to-tail association of only γ-tubulin subunits.
C) lateral association of tubulin dimers.
D) head-to-tail association of tubulin dimers.
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The basal body is a bundle of nine tripl...View Answer
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A) microtubule-associated proteins.
B) incubation at 4°C.
C) ATP.
D) a tubulin concentration in excess of the Cc.
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A) Dynactin is the protein that links dynein to microtubules.
B) Transport is toward the (+) end of the microtubules.
C) GTP binds to the head region of dynein.
D) LIS1 associates with the head region of dynein to facilitate transport.
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A) metaphase.
B) prometaphase.
C) anaphase.
D) telophase.
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A) It promotes microtubule growth by enhancing polymerization at the (+) end.
B) Other microtubule plus-end tracking proteins use EB1 to "hitchhike" onto the growing microtubule.
C) It can bind further back from the blunt end of microtubules.
D) all of the above
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Outer arm axonemal dynein gene...View Answer
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A) centrosome.
B) spindle pole.
C) telomere.
D) centromere.
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A) axons of nerve cells
B) animal cells in interphase
C) animal cells in mitosis
D) dendrites of nerve cells
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The chromosome passenger complex (CPC)is...View Answer
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During anaphase A,kinetochore-...View Answer
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Neuronal vesicles may contain both motor...View Answer
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