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Cell Cycle Basics - General Biology

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  • What is the cell cycle?
    The cell cycle is the series of events that take place in a cell leading to its division and duplication.
  • Name the main phases of the cell cycle.
    The main phases are Interphase (G1, S, G2) and M phase (mitosis and cytokinesis).
  • What happens during G1 phase?
    In G1 phase, the cell grows and performs normal functions while preparing for DNA replication.
  • What occurs in the S phase?
    During S phase, the cell replicates its DNA, doubling its genetic material.
  • Describe the G2 phase.
    G2 phase is when the cell continues to grow and prepares for mitosis by producing necessary proteins.
  • What is mitosis?
    Mitosis is the process of nuclear division resulting in two genetically identical daughter nuclei.
  • What are the stages of mitosis?
    The stages are prophase, metaphase, anaphase, and telophase.
  • What happens during prophase?
    In prophase, chromosomes condense, the nuclear envelope breaks down, and spindle fibers form.
  • Describe metaphase.
    During metaphase, chromosomes align at the cell's equatorial plate.
  • What occurs in anaphase?
    In anaphase, sister chromatids separate and move toward opposite poles.
  • What is telophase?
    Telophase is when nuclear envelopes re-form around the separated chromosomes, which begin to decondense.
  • What is cytokinesis?
    Cytokinesis is the division of the cytoplasm, resulting in two separate daughter cells.
  • What is the role of checkpoints in the cell cycle?
    Checkpoints ensure the cell cycle progresses only when conditions are favorable and DNA is undamaged.
  • Name the major cell cycle checkpoints.
    The major checkpoints are the G1 checkpoint, G2 checkpoint, and metaphase checkpoint.
  • What happens if a cell fails a checkpoint?
    If a cell fails a checkpoint, it may undergo repair, enter a resting state, or trigger apoptosis.
  • Define apoptosis in relation to the cell cycle.
    Apoptosis is programmed cell death that removes damaged or unneeded cells.
  • What is the difference between mitosis and cytokinesis?
    Mitosis divides the nucleus; cytokinesis divides the cytoplasm to form two cells.
  • How does the cell cycle contribute to growth?
    The cell cycle allows organisms to grow by producing more cells through repeated division.
  • Why is DNA replication important in the cell cycle?
    DNA replication ensures each daughter cell receives an identical set of genetic information.
  • What is the significance of the G0 phase?
    G0 phase is a resting state where cells exit the cycle and do not divide.