Question

Which of these statements is absolutely true for cell cycle?

• A. A cell in G1 phase of division can go back to the previous M phase if DNA was not divided properly
• B. In S phase checkpoint, if replication does not occur correctly, the cell re-enters S phase
• C. If the cell is found abnormal or damaged beyond repair, the checkpoints regulate the apoptosis of the cell
• D. Although cell cycle is unidirectional, in the presence of certain hormones, it may be reversed.

Answer 1

The correct option is C

If the cell is found abnormal or damaged beyond repair, the checkpoints regulate the apoptosis of the cell

​If the cell is found abnormal or damaged beyond repair, the checkpoints regulate the apoptosis of the cell by signalling the apoptotic pathway to initiate programmed cell destruction. This holds true no matter what any of the other variables are in a cell cycle.