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Critical Thinking questions 4 & 5
4. The phrase “progressing from G1 to S” is referring to when the centrioles have replicated DNA, and the phrase “passage from G2 to M” means that the checkpoint to trigger mitosis has been reached and mitosis has begun.
5. The cellular organelle responsible for the breakdown of these harmful toxins are the Peroxisomes; they use molecular oxygen to detoxify the harmful substances like alcohol and formaldehyde.