Question

12 what is the purpose of checkpoints? a speed up cell division b repair dna or pause cycle c prevent dna replication d destroy spindle fibers

Explanation:

Cell cycle checkpoints monitor the integrity of the cell cycle events. If there is DNA damage, they either pause the cell cycle to allow for DNA repair or, if the damage is too severe, initiate apoptosis. They do not speed up cell division (A is incorrect), prevent DNA replication (C is incorrect as DNA replication occurs in S - phase and checkpoints regulate it but don't prevent it in a normal non - damaged cell), or destroy spindle fibers (D is incorrect as spindle fibers are important for mitosis and checkpoints don't have this function).

Answer:

B. Repair DNA or pause cycle