What are some factors that might cause a cell to be unable to regulate its cell cycle

Some of the factors that might cause unregulated cell cycle are-

Explanation:

1. Genetic Mutation- mutation in the proto-oncogenes can turn them into oncogenes which stimulate cell division. Some common causes of genetic mutation are radiations, chemical agents called mutagens, etc.

2. Growth factors- these are the molecules that bind to receptor proteins to initiate a signaling pathway that can result in cell cycle.

3. Tumor suppressor genes- these are the genes responsible for stopping the cell to enter cell cycle. Inactivation of these genes can cause unregulated cell division.

4. Cell cycle checkpoints - during the cell cycle, a cell has to pass through certain checkpoints which make sure the continuity or stopping of the process. Problem in their regulation can cause uncontrolled cell division.

5. retroviruses- These are the viruses who have RNA as their genetic material instead of DNA. They replicate via DNA intermediate which when they insert inside a cell can start cell cycle.

your spelling is a little off : ]