Progression through the cell cycle is regulated by oscillations in theconcentration of which type of molecule?a. p53, Rb, and other tumor suppressorsb. receptor tyrosine kinasesc. cyclinsd. cyclin-dependent kinases

The M phase checkpoint ensures that all chromosomes are attached to the mitotic spindle. If this does not happen, cells would most likely be arrested in ________.

a) Telophase.

b) Prophase.

c) G2.

d) Metaphase.

Which of the following cell cycle checkpoints ensures that the genetic material is fully replicated before mitosis?