Which microtubule (MT) population binds to chromosomes during mitosis? (1 point)
ID: 186878 • Letter: W
Question
Which microtubule (MT) population binds to chromosomes during mitosis?
(1 point)
Interpolar MTs
Kinetochore MTs
Astral MTs
Either MT population is able to bind chromosomes because they are functionally redundant
MTs do not associate with chromosomes at all
2.
When does the centrosome duplicate?
(1 point)
In parallel to chromosome segregation in mitosis
In parallel with DNA replication in S-phase
In G1
In G2
In an unregulated manner
3.
Which of the following intermediates of intermediate filament assembly is polar?
(1 point)
Dimer
Tetramer
Octamer
Intermediate filament bundle
None, intermediate filaments are always apolar
4.
Which of the following signals induces the disassembly of the nuclear lamina?
(1 point)
Phosphorylation by a mitotic kinase
Activation of a small GTPase
Fragmentation of the nuclear envelope
A conformational change in lamin A
DNA condensation
Explanation / Answer
1.
Disc-shaped protein structure found at centromere of a chromatid to which microtubules attach during cell division.
2.
Chromosome segregation is a process in which formation of two sister chromatids as a result of DNA replication. The segregation process will occur in both mitosis and meiosis.
3.
Intermediate filaments are non-polar. Intermediate filaments are structural proteins which provide support to cells and tissues.
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