CELL STRUCTURES AND FUNCTION
CELL CYCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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G1 checkpoint
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S checkpoint
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G2 checkpoint
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M checkpoint
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Detailed explanation-1: -The G2 checkpoint bars entry into the mitotic phase if certain conditions are not met. As with the G1 checkpoint, cell size and protein reserves are assessed. However, the most important role of the G2 checkpoint is to ensure that all of the chromosomes have been accurately replicated without mistakes or damage.
Detailed explanation-2: -The main function of the G2 checkpoint is to ensure that replication of all chromosomes is complete and without introductions of mutations or unrepaired DNA damage. In addition, appropriate cell size and protein reserves are also assessed during this checkpoint.
Detailed explanation-3: -The G1 checkpoint, also called the restriction point, is the point at which the cell irreversibly commits to the cell-division process. In addition to adequate reserves and cell size, there is a check for damage to the genomic DNA at the G1 checkpoint.