Which of the following accurately describes the role of motor proteins during anaphase of mitosis?
Kinesins move chromosomes towards the minus ends of kinetochore microtubules, and dyneins move chromosomes towards the plus ends.
Dyneins move chromosomes towards the poles along kinetochore microtubules, while kinesins are involved in cytokinesis.
Kinesins move chromosomes towards the plus ends of kinetochore microtubules, while dyneins move the poles apart by acting on astral microtubules.
Both kinesins and dyneins move chromosomes towards the poles along kinetochore microtubules, with kinesins acting on the leading edge and dyneins on the trailing edge.
Related Questions
A researcher is studying mitosis in a novel diploid organism with 2n = 16 chromosomes. During metaphase, a drug is applied that inhibits the separation of sister chromatids but allows the cell to progress through anaphase and telophase. At the end of this aberrant cell division, what is the most likely chromosomal composition of the resulting daughter cells?
Two diploid cells (2n=16) each
One diploid cell (2n=16) and one cell with no chromosomes
One tetraploid cell (4n=32)
Two cells with 8 chromosomes each
Which of the following events is NOT characteristic of mitotic cell division?
Condensation of chromosomes
Replication of DNA
Synapsis and crossing over
Formation of the spindle apparatus
A scientist observes a dividing cell under a microscope. No crossing over is observed. Which type of cell division is MOST likely being observed?
Meiosis I
Meiosis II
Mitosis
Cytokinesis
During mitosis, which of these processes does NOT take place?
DNA replication
Separation of sister chromatids
Formation of the mitotic spindle
Cytokinesis
The spindle microtubules are polar, their orientation is
Positive (+) and negative (-) both ends towards the equator
Positive (+) ends towards the poles
negative (-) ends towards the poles
Positive (+) and negative (-) both ends towards the poles
The anaphase promoting complex is activated by
M cdk cyclin
cdk cyclin
S cdk cyclin
Transaction factor
If a cell undergoing division exhibits synapsis and crossing over, which type of cell division is it NOT undergoing?
Mitosis
Meiosis I
Meiosis II
Binary fission
Which of the following events does NOT occur during prometaphase of mitosis?
Breakdown of the nuclear envelope
Attachment of kinetochore microtubules to chromosomes
Movement of chromosomes towards the metaphase plate
Replication of the centrosomes
All of the following are observed during mitotic cell division EXCEPT:
Chromosome condensation
Spindle formation
Nuclear envelope breakdown
Genetic recombination through crossing over
In an experiment, cells are arrested in metaphase using colchicine, a drug that inhibits microtubule polymerization. If these cells are then fused with cells in G1 phase, what is the most likely outcome for the G1 chromosomes?
The G1 chromosomes will replicate their DNA.
The G1 chromosomes will condense prematurely.
The G1 chromosomes will remain unaffected.
The G1 chromosomes will fragment.
