The G₁ checkpoint, also called the "restriction point," ensures
- A
DNA replication has been fully completed without errors
- Bcheck_circle
Conditions are favorable to commit to division (cell size, DNA undamaged, growth signals)
- C
All chromosomes are properly attached to spindle microtubules
- D
Cytokinesis is properly initiated after telophase ends
Explanation
G₁ checkpoint: if conditions are unfavorable, cell exits to G₀ (resting state) instead of dividing.