Biology 9700 · AS & A Level · Replication and division of nuclei and cells

Replication and division of nuclei and cells — practice question

As the mitotic cell cycle moves through its stages, the DNA content of a cell changes. Which row correctly states when DNA is replicated and when the nuclear envelope disintegrates?

  • ADNA replicates: 1; nuclear envelope breaks down: 3
  • BDNA replicates: 1; nuclear envelope breaks down: 4
  • CDNA replicates: 2; nuclear envelope breaks down: 3
  • DDNA replicates: 2; nuclear envelope breaks down: 4

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