The following statements describes examples of facilitated diffusion:
1. It requires concentration gradient.
2. It requires the assistance of protein carriers.
Facilitated diffusion refers to the movement of molecules into the cell with the help of carrier proteins. It is a passive form of movement.<span />
Answer: Cell apoptosis (cell death)
Explanation: p53 protein determines whether the DNA of a cell will be repaired or damaged when the DNA is affected by harmful agents (e.g. Radiation, toxic chemicals). If the DNA cannot be repaired the protein prevents the cell from dividing and signals the cell to undergo cell death, by this apoptosis of the cell, this stops the cell from undergoing mutation or division which then prevents the development of tumours.
