Question

there are three checkpoints in the cell cycle. what is their role?
a) ensure that each phase is complete before the next phase
b) ensure that the cell divides the correct number of times
c) ensure that the cell reaches the right size before proceeding to the next phase
d) ensure that dna is accurately translated into protein

Explanation:

Cell cycle checkpoints are regulatory points that assess if key processes in each phase (like DNA replication, spindle formation) are completed correctly before allowing the cell to progress to the next phase of the cycle. Option b is incorrect as checkpoints do not control the total number of cell divisions. Option c is only one narrow aspect of checkpoint function, not the overarching role. Option d describes a process (translation) unrelated to cell cycle checkpoints, which focus on cell cycle progression, not protein synthesis.

Answer:

a) Ensure that each phase is complete before the next phase