Questions and Answers
What do cells need to do between divisions to make sure that they don't just get smaller and smaller?
Cells must grow in between divisions.
What do cells need to do between divisions to make sure that a full set of DNA gets passed on to each daughter cell?
Cells must double their DNA in order to pass a full set to each daughter cell.
In what phase of mitosis does a cell spend most of its life?
Interphase.
What are the phases of mitosis?
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What occurs during interphase?
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What occurs during prophase?
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What occurs during metaphase?
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What occurs during anaphase?
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What occurs during telophase?
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What occurs during cytokinesis?
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During which phase is DNA duplicated?
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What is the relationship between chromatin and chromosomes?
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In which phase are chromatids pulled apart?
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What is the role of centrioles?
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In which phase does a new nuclear membrane develop?
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A cell has a single line of chromosomes. What is the phase?
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Why is it important that the cell's DNA is duplicated before cell division?
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Which phase of the cell cycle is the longest?
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Which phase of the cell cycle is the shortest?
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Study Notes
Cell Division Overview
- Cells must grow between divisions to avoid becoming smaller over time.
- Ensures a full set of DNA is passed on to each daughter cell by duplicating their DNA prior to division.
Cell Cycle Phases
- Interphase is the phase where cells spend most of their life, characterized by growth and preparation for division.
- Phases of mitosis include prophase, metaphase, anaphase, and telophase.
Interphase Details
- Divided into three stages:
- G1 Stage: Cell growth and development occur.
- S Stage: DNA duplication within chromatin takes place.
- G2 Stage: Synthesis of organelles in preparation for cell division.
Mitosis Phases
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Prophase:
- First phase; nucleolus disappears.
- Chromatin condenses into visible chromosomes.
- Nuclear membrane dissolves.
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Metaphase:
- Each chromosome attaches to spindle fibers.
- Chromosomes align along the cell's equator.
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Anaphase:
- Centromeres split, pulling chromatids toward opposite poles.
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Telophase:
- Nuclear membranes reform around each set of chromosomes.
- Chromosomes unwind back into chromatin.
Cytokinesis
- Final stage where two identical nuclei are formed.
- Cytoplasm divides as the cell pinches inward, creating two daughter cells.
Key Relationships and Roles
- DNA is duplicated during interphase, ensuring each new cell possesses a complete genetic blueprint.
- Chromosomes, made up of chromatin, represent the structure of the genetic material.
- Chromatids are separated during anaphase, ensuring proper distribution of genetic material.
- Centrioles play a critical role in cell division by producing spindle fibers necessary for chromosome movement.
Duration of Phases
- Interphase is the longest phase of the cell cycle, while cytokinesis is the shortest phase.
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Description
Explore essential concepts of cell division with these flashcards. Each card covers crucial aspects such as cell growth and DNA replication between divisions, making it perfect for students studying cell biology.
