Question

The progression through the cell division cycle may be halted at checkpoints for what reasons?

1) To ensure that DNA is replicated accurately
2) To repair damaged DNA
3) To prevent the formation of abnormal cells
4) All of the above

Answer 1

Cell division cycle may be halted at checkpoints to ensure DNA replication accuracy, repair damaged DNA, and prevent abnormal cell formation, which are all essential for maintaining genetic integrity and preventing diseases like cancer.

Step-by-step explanation:

Reasons for Halting Cell Division Cycle at Checkpoints

The progression through the cell division cycle may be halted at checkpoints for several critical reasons. These internal control mechanisms are vital for ensuring the integrity and proper functioning of the cell. Checkpoints in the cell cycle serve to:

1. Ensure that DNA is replicated accurately - to prevent the passage of genetic errors to daughter cells.
2. Repair damaged DNA - to maintain the cell's genetic integrity and prevent the propagation of mutations.
3. Prevent the formation of abnormal cells - to avoid the development of issues such as cancer from uncontrolled cell growth.

All these checkpoints work together to monitor and promote healthy cell division, contributing to the organism's overall well-being.