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MCAT Biological and Biochemical Foundations of Living Systems Flashcards: 2c Mitosis Chromosome Dynamics

Study 2c Mitosis Chromosome Dynamics in MCAT Biological and Biochemical Foundations of Living Systems with focused flashcards that help you recognize the idea, recall the key rule, and apply it in practice-style prompts.

QUESTION

What is the key event of S phase that changes chromosome structure before mitosis?

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ANSWER

DNA replication producing sister chromatids. S phase duplicates the genome, forming paired chromatids essential for equal segregation during mitosis.

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MCAT Biological and Biochemical Foundations of Living Systems: Foundational Concept 2: Cells and Cellular Organization

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This deck focuses on 2c Mitosis Chromosome Dynamics, giving you a quick way to review the definitions, rules, and examples that matter most for MCAT Biological and Biochemical Foundations of Living Systems.

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Work through these flashcards in short sessions. Try to answer each prompt before flipping the card, then revisit any cards you miss until the explanation feels automatic.

Practice questions

1 of 50Practice questions for this set
Human epithelial cells were engineered to express a fluorescent kinetochore marker and imaged during mitosis. Investigators added a small molecule that reduces microtubule dynamics without fully depolymerizing the spindle. Compared with vehicle-treated cells, treated cells spent longer between nuclear envelope breakdown and anaphase onset, and many cells displayed chromosomes remaining near one spindle pole rather than forming a tight metaphase plate. Immunostaining showed that these mispositioned chromosomes frequently retained spindle-assembly checkpoint (SAC) proteins at their kinetochores. Based on the study, which conclusion about chromosome alignment is most consistent with the data?
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