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Get Answers to all your Questions
- #Biology
- #National Eligibility Cum Entrance Test
- #Cell Structure and Function
- #Class 11
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- #National Eligilibility Cum Entrance Test
The assessment of replication of DNA occurs during
Option: 1
G2 checkpoint
Option: 2
G1 checkpoint
Option: 3
M checkpoint
Option: 4
All of these
Answers (1)
Control and Regulation of the Cell Cycle
- The regulation of the cell cycle is important so that faulty or compromised cell could not divide.
- There can be a mutation during DNA replication and other events of the cell cycle.
- Therefore, there are checkpoints in the cell cycle that would check for the errors and would stop the cell cycle if there is any fault and would allow the cell cycle to continue if there is no fault.
- There are three checkpoints in the cell cycle as G1 checkpoint, G2 checkpoint and M checkpoint.
G2 checkpoint:
- The G2 checkpoint prevents entry into the mitotic phase if certain conditions are not met by the cell.
- At this checkpoint, cell size and protein reserves are checked.
- The most important checking at the G2 checkpoint is to check whether all the chromosomes have been replicated and that the replicated DNA is not damaged.
- If the problem is detected, then the cell cycle is halted.
- The cell attempts to either complete DNA replication or repair the damaged DNA.
-
The most important checking at the G2 checkpoint is to check whether all the chromosomes have been replicated and that the replicated DNA is not damaged.
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