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Answer:

If the checkpoint mechanisms detect problems with the DNA, the cell cycle is halted and the cell attempts to either complete DNA replication or repair the damaged DNA. If the DNA has been correctly replicated, Cyclin dependent Kinases signal the beginning of mitotic cell division.

Explanation:

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The purpose of checkpoints in the cell cycle is to ensure that there are no mistakes in the mitotic process.

In other words, checkpoints in cell cycles are a kind of quality control that ensures that the major events of the cycle take place without mistakes.

A typical cell cycle consists of the interphase and the m phase, which is essentially the mitotic division phase. The interphase is further divided into:

  • G1 phase: cell growth phase
  • S phase: DNA synthesis phase
  • G2 phase: protein synthesis phase

There are 3 major checkpoints in a typical cell cycle:

  • G1 checkpoint: this is where the cell checks that things are in order for division to proceed
  • G2 checkpoint: the checks that chromosome numbers and DNA integrity are appropriate for division to occur
  • Metaphase checkpoint: this is where the check of whether all sister chromatids are appropriately attached to spindles before proceeding to anaphase.

More on the cell cycle can be found here: https://brainly.com/question/12277305

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