🧬ap biology review

G0 Phase

Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examWritten by the Fiveable Content Team • Last updated September 2025

Definition

The G0 phase is a period in the cell cycle where cells exist in a quiescent (inactive) state. Cells in this stage are not preparing for or undergoing division.

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