Cells that have permanently exited the cell cycle (e.g., mature neurons) are said to be in
- A
S phase (active DNA replication state)
- B
G₂ (a gap phase preparing for mitosis)
- C
M phase (active mitotic division state)
- Dcheck_circle
G₀ (a non-dividing resting state)
Explanation
G₀: cells perform their function without dividing; some can re-enter G₁ if stimulated, others (like neurons) are permanent.