Podcast
Questions and Answers
Which of the following best describes the primary function of the S phase within the cell cycle?
Which of the following best describes the primary function of the S phase within the cell cycle?
- Preparing the cell for division through additional growth.
- Duplicating DNA to ensure each daughter cell receives a complete copy of the genome. (correct)
- Replicating centrioles and producing more organelles.
- Dividing the cytoplasm resulting in two daughter cells.
During which phase of mitosis do sister chromatids separate and migrate to opposite poles of the cell?
During which phase of mitosis do sister chromatids separate and migrate to opposite poles of the cell?
- Metaphase
- Telophase
- Anaphase (correct)
- Prophase
What cellular process occurs during telophase?
What cellular process occurs during telophase?
- The chromosomes move to the equator of the spindle.
- The centromeres split and the sister chromatids are pulled apart.
- The chromatin coils and forms visible chromosomes.
- The nuclear envelope re-appears and chromosomes begin to uncoil. (correct)
In animal cells, how does cytokinesis typically occur?
In animal cells, how does cytokinesis typically occur?
What is the primary event that defines metaphase in mitosis?
What is the primary event that defines metaphase in mitosis?
A cell has just completed DNA replication. In what stage of the cell cycle would this cell be?
A cell has just completed DNA replication. In what stage of the cell cycle would this cell be?
Which of the following reasons explains why cells must undergo cell division?
Which of the following reasons explains why cells must undergo cell division?
In what way does prophase contribute to the preparation of cell division?
In what way does prophase contribute to the preparation of cell division?
If a drug prevents the formation of the spindle during mitosis, which stage will be directly affected?
If a drug prevents the formation of the spindle during mitosis, which stage will be directly affected?
Considering the entire cell cycle, in which stage does the cell spend the majority of its time?
Considering the entire cell cycle, in which stage does the cell spend the majority of its time?
Flashcards
Why do Cells Divide?
Why do Cells Divide?
Growth, maintenance, repair, regeneration, and asexual reproduction.
What happens in Gap 1 (G1)?
What happens in Gap 1 (G1)?
Rapid growth, metabolic activity, centriole replication, and organelle production occur.
What happens in Synthesis (S)?
What happens in Synthesis (S)?
DNA replication.
What happens in Gap 2 (G2)?
What happens in Gap 2 (G2)?
Signup and view all the flashcards
What happens in Prophase?
What happens in Prophase?
Signup and view all the flashcards
What happens in Metaphase?
What happens in Metaphase?
Signup and view all the flashcards
What happens in Anaphase?
What happens in Anaphase?
Signup and view all the flashcards
What happens in Telophase?
What happens in Telophase?
Signup and view all the flashcards
What is cytokinesis?
What is cytokinesis?
Signup and view all the flashcards
Cytokinesis in Animals
Cytokinesis in Animals
Signup and view all the flashcards
Study Notes
- Cell division is essential for growth, development, organism maintenance, repair, regeneration, and asexual reproduction.
- Uncontrolled cell division can lead to cancer and cancerous cells.
Steps of the Cell Cycle
Interphase
- A cell cycle stage consisting of Gap 1 (G1), Synthesis (S), and Gap 2 (G2).
- G1 involves rapid growth and metabolic activity, centriole replication, and increased organelle production.
- S phase is where DNA replication occurs.
- G2 involves more growth and final preparations for cell division.
Mitosis
- Mitosis is the division of the nucleus.
- Prophase: Chromatin coils into visible chromosomes, the nuclear envelope and nucleolus disappear, and the spindle forms between centriole pairs (which have moved to opposite poles).
- Metaphase: Chromosomes move to the spindle equator, with each chromatid attached to a spindle fiber by its centromere.
- Anaphase: Centromeres split, and sister chromatids are pulled to opposite cell poles, turning each chromatid into a separate chromosome.
- Telophase: Two genetically identical daughter cells form, chromosomes gather at each end of the cell, cytoplasm divides through cytokinesis, the nucleolus and nuclear envelope reappear, the spindle breaks down, and chromosomes uncoil.
- After separation, new cells enter interphase, starting a new cell cycle.
Cytokinesis
- Cytokinesis is division of the cytoplasm resulting in two genetically identical daughter cells and happens simultaneously with telophase.
- In animal cells, cytokinesis involves a cleavage furrow pinching in.
- In plant cells, cytokinesis involves cell plating with thick plates due to the presence of cell walls.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
