MDCN120 Mitosis & Meiosis Commitee 3 Lecture 1-2 Cell Division
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Questions and Answers

During which phase of the cell cycle does the duplication of centrioles primarily occur?

  • Interphase
  • G1 phase
  • G2 phase
  • S phase (correct)
  • Metaphase

    • Which structure contains the pericentriolar material and is involved in the organization of microtubules during cell division?

  • Centrosome matrix (correct)
  • Kinetochore microtubules
  • Aster
  • Metaphase plate
  • Polar microtubules

    • What is the average lifespan of an Intestinal Cell before it undergoes cell division?

  • Several years
  • 2 weeks
  • 4-5 days (correct)
  • 300-500 days
  • 4 months

    • Which of the following is NOT a process that occurs during cell division?

    <p>Formation of Kinetochore microtubules</p> Signup and view all the answers

    What is the main purpose of Centriole Replication in cell division?

    <p>Organization of Microtubules</p> Signup and view all the answers

    During the mitotic division, what happens at the end of Prophase?

    <p>Chromosomes start to coil up and bend.</p> Signup and view all the answers

    What is the main role of astral microtubules in cell division?

    <p>Require the action of motor proteins, especially dynein.</p> Signup and view all the answers

    Which specific DNA region holds sister chromatids together during cell division?

    <p>Centromere</p> Signup and view all the answers

    What is a key difference between mitotic division and meiotic division?

    <p>Formation of sister chromatids</p> Signup and view all the answers

    What initiates the coiling up and thickening of chromatin fibers to form chromosomes during mitotic division?

    <p>Mitotic spindle</p> Signup and view all the answers

    What is the role of kinetochore microtubules in chromosome segregation?

    <p>Help pull the chromosomes to the poles of the cell</p> Signup and view all the answers

    What is the main function of kinetochore microtubules during mitotic division?

    <p>Pulling sister chromosomes from their centromeres to the poles</p> Signup and view all the answers

    Which phase of mitotic division involves the depolymerization of kinetochore microtubules?

    <p>Anaphase</p> Signup and view all the answers

    What is the approximate rate of microtubule depolymerization during mitosis?

    <p>50 tubulin units/second</p> Signup and view all the answers

    Which process marks the beginning of cytokinesis in cell division?

    <p>Cleavage furrow formation</p> Signup and view all the answers

    What occurs during telophase of mitotic division?

    <p>Chromosomes start to get slimmer and become chromatin again</p> Signup and view all the answers

    How do microtubules contribute to chromosome movement during cell division?

    <p>By interacting with proteins that bind to tubulin with high affinity</p> Signup and view all the answers

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