Final answer:
Overproduction of cyclin can cause uncontrolled cell division, which can lead to the formation of tumors and cancer due to the breakdown of regulation mechanisms within the cell cycle. The correct option is e,
Step-by-step explanation:
The overproduction of cyclin causes uncontrolled cell division rate, potentially leading to cancer. Cyclins are regulatory proteins that control the progression of cells through the cell cycle by activating cyclin-dependent kinases (Cdks).
Their levels fluctuate throughout the cell cycle, and if their regulation is disrupted, it can lead to a breakdown of the cell cycle checkpoints. When these checkpoints, which ensure cells do not divide before they are ready or if there is DNA damage, malfunction, it permits continued cell division despite errors.
This can ultimately lead to the formation of tumors and the onset of cancer. The overproduction of cyclins might be a result of mutations in genes that encode these proteins, or it might be due to external factors that impact cell cycle regulation, such as radiation or toxic chemicals. The correct option is e,