Lecture 11 (cell division - cell cycle) Flashcards
During cell division, the spindle fibres attach to the chromosomes at a region called:
Kinetochore
Best stage to observe shape, size and number of chromosome is:
Metaphase
During mitosis ER and nucleilus begin to disappear at:
Early prophase
Which of these is the most eventful period of the cell cycle:
M phase
In which phase is chromosome condensation intiated:
Prophase
What happens to the chromosome during chromatin condensation:
It becomes detangled
In which phase do the centrosomes start moving to the opposite poles of the cell.
Prophase
Which of these structures is the site of attachment of chromatids:
Centromere
What are asters made of?
Mictrotubules
What are the constituents of the mitotic apparatus?
Asters, spindle fibers
Which of these structures are visible under the microscope at the end of prophase?
Asters
In which phase does the nuclear envelope distintegrate?
Metaphase
What is the shape of a kinetochore?
Disc-shaped (they are present on centromeres, which are the place of attchment of sister chromatids)
The condensation of chromosomes is observed in
Prophase 1
Nuclear DNA replicated in the …. Phase
S phase
The number of DNA in the chromosome at the G2 stage of the cell cycle:
2
The longest stage in the cell cycle is
Interphase
The … state implies the exit of cells from the cell cycle
G0
Synapsis is defined as the pairing of
Homologus chromosomes
The spindle apparatus is formed during the …. Phase of mitosis
Metaphase
Cyclin is associated with
Mitosis
Chromosome structure can be observed best during
Metaphase
