17 Questions
During which phase of the cell cycle does the duplication of centrioles primarily occur?
S phase
Which structure contains the pericentriolar material and is involved in the organization of microtubules during cell division?
Centrosome matrix
What is the average lifespan of an Intestinal Cell before it undergoes cell division?
4-5 days
Which of the following is NOT a process that occurs during cell division?
Formation of Kinetochore microtubules
What is the main purpose of Centriole Replication in cell division?
Organization of Microtubules
During the mitotic division, what happens at the end of Prophase?
Chromosomes start to coil up and bend.
What is the main role of astral microtubules in cell division?
Require the action of motor proteins, especially dynein.
Which specific DNA region holds sister chromatids together during cell division?
Centromere
What is a key difference between mitotic division and meiotic division?
Formation of sister chromatids
What initiates the coiling up and thickening of chromatin fibers to form chromosomes during mitotic division?
Mitotic spindle
What is the role of kinetochore microtubules in chromosome segregation?
Help pull the chromosomes to the poles of the cell
What is the main function of kinetochore microtubules during mitotic division?
Pulling sister chromosomes from their centromeres to the poles
Which phase of mitotic division involves the depolymerization of kinetochore microtubules?
Anaphase
What is the approximate rate of microtubule depolymerization during mitosis?
50 tubulin units/second
Which process marks the beginning of cytokinesis in cell division?
Cleavage furrow formation
What occurs during telophase of mitotic division?
Chromosomes start to get slimmer and become chromatin again
How do microtubules contribute to chromosome movement during cell division?
By interacting with proteins that bind to tubulin with high affinity
This quiz covers the organization of growth, DNA replication, and division of the cell in the context of cell division, cell cycle, reproduction, growth and development, tissue regeneration, and lifespan of different cell types.
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