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Which statement best describes chromosomal movement during mitosis?
  • a)
    Centrioles send out microtubules, which bind to kinetochores to pull chromatids apart.
  • b)
    Microtubules bind tubulin polymers on centromeres to initiate homologous chromosome separation.
  • c)
    Centrioles on chromatids bind kinetochores to rays sent by the asters.
  • d)
    ach centrosome binds an individual chromatid to ensure equal division.
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Which statement best describes chromosomal movement during mitosis?a)C...
During mitosis, the movement of chromosomes is facilitated by the interaction between microtubules and kinetochores. Centrioles, located in the centrosomes, organize and send out microtubules that form the mitotic spindle. The microtubules attach to kinetochores, which are protein structures located at the centromeres of sister chromatids.
As the mitotic spindle forms, the microtubules extend and connect to the kinetochores of each sister chromatid. The microtubules exert forces on the kinetochores, pulling the sister chromatids apart towards opposite poles of the cell. This separation ensures that each daughter cell receives an equal and complete set of chromosomes.
Option B is incorrect because homologous chromosome separation occurs during meiosis, not mitosis. Option C is incorrect as centrioles on chromatids do not exist. Option D is also incorrect because each centrosome does not bind an individual chromatid, but rather the microtubules from both centrosomes collectively interact with all the chromatids.
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Which statement best describes chromosomal movement during mitosis?a)Centrioles send out microtubules, which bind to kinetochores to pull chromatids apart.b)Microtubules bind tubulin polymers on centromeres to initiate homologous chromosome separation.c)Centrioles on chromatids bind kinetochores to rays sent by the asters.d)ach centrosome binds an individual chromatid to ensure equal division.Correct answer is option 'A'. Can you explain this answer? for MCAT 2025 is part of MCAT preparation. The Question and answers have been prepared according to the MCAT exam syllabus. Information about Which statement best describes chromosomal movement during mitosis?a)Centrioles send out microtubules, which bind to kinetochores to pull chromatids apart.b)Microtubules bind tubulin polymers on centromeres to initiate homologous chromosome separation.c)Centrioles on chromatids bind kinetochores to rays sent by the asters.d)ach centrosome binds an individual chromatid to ensure equal division.Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for MCAT 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which statement best describes chromosomal movement during mitosis?a)Centrioles send out microtubules, which bind to kinetochores to pull chromatids apart.b)Microtubules bind tubulin polymers on centromeres to initiate homologous chromosome separation.c)Centrioles on chromatids bind kinetochores to rays sent by the asters.d)ach centrosome binds an individual chromatid to ensure equal division.Correct answer is option 'A'. Can you explain this answer?.
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