Assertion (A) : The cell cycle must be controlled.
Reason (R) : Damaged or compromised cells cannot divide.
If both assertion and reason are true and the reason is the correct explanation of the assertion.
If both assertion and reason are true but reason is not the correct explanation of the assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
A. The cell cycle is the orderly, sequential process by which a cell duplicates itself. This process is tightly regulated to guarantee that the DNA of a dividing cell is accurately duplicated, that any DNA errors are corrected, and that each daughter cell obtains a complete set of chromosomes. Hence assertion is true.
The p53 protein normally assists in cell suicide (also known as apoptosis) when a cell's DNA is damaged. Hence reason is true. Therefore option A is correct.