Multiple choice

In which phase of the cell cycle does DNA become inactive?

  1. G0 phase

  2. S phase

  3. G1 phase

  4. M phase

  5. G2 phase
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In the relatively short M (mitosis) phase the two copies of the replicated chromosomes are separated and the cell divides. In this phase the chromosomes are highly condensed, with the DNA tightly wrapped around histones. In this state they are inactive and neither DNA replication or transcription takes place.

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