Cell-cycle checkpoints are key transition stages that allow or prohibit the cell's progression to the next stage. what is happening during cell cycle checkpoints? choose the correct answer from the following choices, and then select the submit answer button. answer choices
a. functioning and presence of cellular components are verified.
b. the cell grows, develops, and functions.
c. sister chromatids move toward opposite poles.
d. dna is replicated and rna and proteins are being produced.
e. cytoplasmic division begins as the cell completes division.