GCSE Combined Science (AQA)

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Interphase

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Cell Biology Cell Division

Interphase

2:07 Cell Division
Spec 4.1.2.2
Previous The Cell Cycle Next Mitosis
  • Interface prepares the cell for division.
  • Interphase ensures each new cell is identical by duplicating the cell's contents before division.
  • There are three stages in the cell cycle: Interphase, Mitosis, and Cytokinesis.
  • Interphase takes up the majority of the cell cycle and is the stage where the cell spends most of its time.
  • During Interphase, the cell duplicates its chromosomes to ensure each daughter cell is genetically identical.
  • The human body has 23 pairs of chromosomes, but diagrams often simplify this for clarity.
  • Chromosomes are duplicated before division, with each original chromosome paired with its copied chromosome, joined by the centromere.
  • Each chromosome within the pair is duplicated, ensuring daughter cells are diploid like the parent cell.
  • Before division, the cell must also grow and increase the number of subcellular structures.
  • As the cell prepares to divide, it increases in size and the number of subcellular structures like mitochondria and ribosomes, ensuring there is enough for two individual cells.

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