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I am answering my own question here I'm afraid, but I have since found the answer.
Basically, a checkpoint (otherwise known as the DNA damage checkpoint) response is a stage in DNA replication where the cell cycle stops owing to DNA damage and becomes more susceptible to apoptosis ( programmed cell death). a more detailed answer is shown in the paragraph below.
"In response to DNA damage, eukaryotic cells activate a set of surveillance systems that interrupt cell cycle progression to allow time for repair. These surveillance systems are called checkpoints and have been given an empirical definition. The DNA damage checkpoint acts in three stages in the cell cycle, one at the G1-S phase transition (G1 checkpoint), one at S phase (S-phase checkpoint), and one at the G2-M boundary (G2 checkpoint. With checkpoint failure, the immediate consequence is that the cells increase their sensitivity to being killed, and the long-term consequence is that the cells increase their susceptibility to tumor genesis. S-phase checkpoint monitors progression through S phase, which slows the rate of on-going DNA synthesis."
Ref: http://cancerres.aacrjournals.org/cgi/content/full/62/6/1598
What else can I help you with?
At the DNA synthesis G2 checkpoint DNA replication is checked by 1 receptor proteins 2 Repair enzymes 3 electron transport chains 4 cell surface markers?
2 Repair enzymes. At the DNA synthesis G2 checkpoint, DNA replication is checked by repair enzymes that detect and repair any mistakes in the replicated DNA before the cell progresses to mitosis. Receptor proteins, electron transport chains, and cell surface markers are not directly involved in checking DNA replication at this checkpoint.
What is synthesis checkpoint?
A synthesis checkpoint is a regulatory mechanism during the cell cycle that ensures proper DNA replication and synthesis before a cell proceeds to mitosis. It assesses the integrity and completeness of the replicated DNA, allowing for the repair of any damage or errors. If issues are detected, the checkpoint can halt the cell cycle, providing time for repairs or triggering apoptosis if the damage is irreparable. This process is crucial for maintaining genomic stability and preventing the propagation of mutations.
What checkpoints determines if cell division has occurred properly?
Cell division is monitored by several key checkpoints: the G1 checkpoint assesses DNA integrity and cell size before DNA synthesis; the G2 checkpoint ensures that DNA replication has completed accurately and checks for DNA damage; and the M checkpoint verifies that all chromosomes are correctly attached to the spindle apparatus before the cell proceeds with mitosis. These checkpoints help prevent the propagation of errors and maintain genomic stability.
Where is the checkpoint for DNA damage?
g1
What occurs just before the cell enter the G2 stage of the cell cycle?
Just before a cell enters the G2 stage of the cell cycle, it completes the S phase, during which DNA replication occurs, resulting in two complete sets of chromosomes. Following DNA synthesis, the cell enters a checkpoint phase that ensures all DNA has been accurately replicated and repaired, if necessary. This checkpoint is crucial for maintaining genetic stability before the cell proceeds to mitosis. After passing this checkpoint, the cell transitions into G2, where it prepares for division.
At the DNA synthesis G2 checkpoint DNA replication is checked by 1 receptor proteins 2 Repair enzymes 3 electron transport chains 4 cell surface markers?
2 Repair enzymes. At the DNA synthesis G2 checkpoint, DNA replication is checked by repair enzymes that detect and repair any mistakes in the replicated DNA before the cell progresses to mitosis. Receptor proteins, electron transport chains, and cell surface markers are not directly involved in checking DNA replication at this checkpoint.
What is synthesis checkpoint?
A synthesis checkpoint is a regulatory mechanism during the cell cycle that ensures proper DNA replication and synthesis before a cell proceeds to mitosis. It assesses the integrity and completeness of the replicated DNA, allowing for the repair of any damage or errors. If issues are detected, the checkpoint can halt the cell cycle, providing time for repairs or triggering apoptosis if the damage is irreparable. This process is crucial for maintaining genomic stability and preventing the propagation of mutations.
What happens at the G1 checkpoint of interphase?
At the G1 checkpoint of interphase, the cell assesses whether it is ready to proceed to DNA synthesis (S phase). It evaluates factors such as cell size, nutrient availability, and DNA integrity. If conditions are favorable, the cell moves forward; if not, it may enter a resting state (G0 phase) or initiate repair processes. This checkpoint is crucial for preventing damaged DNA from being replicated.
What checkpoints determines if cell division has occurred properly?
Cell division is monitored by several key checkpoints: the G1 checkpoint assesses DNA integrity and cell size before DNA synthesis; the G2 checkpoint ensures that DNA replication has completed accurately and checks for DNA damage; and the M checkpoint verifies that all chromosomes are correctly attached to the spindle apparatus before the cell proceeds with mitosis. These checkpoints help prevent the propagation of errors and maintain genomic stability.
Where is the checkpoint for DNA damage?
g1
Which phase do DNA synthesis occur?
Actually, DNA synthesis occurs in the interphase stage, after the G1 checkpoint and before the G2 checkpoint, in the synthesis period, sometimes referred to as the 'S' phase, though it is not in fact a phase of mitosis, but rather a part of the Interphase as a whole. I hope this is more helpful than the previous answer of; "nobody knows IDIOT."
Another term for DNA synthesis?
DNA synthesis is also known as DNA replication.
What occurs just before the cell enter the G2 stage of the cell cycle?
Just before a cell enters the G2 stage of the cell cycle, it completes the S phase, during which DNA replication occurs, resulting in two complete sets of chromosomes. Following DNA synthesis, the cell enters a checkpoint phase that ensures all DNA has been accurately replicated and repaired, if necessary. This checkpoint is crucial for maintaining genetic stability before the cell proceeds to mitosis. After passing this checkpoint, the cell transitions into G2, where it prepares for division.
When does a cell make sure DNA has been copied correctly before continuing in the cell cycle?
DNA is copied (or replicated) by an enzyme called DNA polymerase. This enzyme generally operates in the 3' to 5' direction. However, this enzyme also has a 5' to 3' exonuclease activity, which enables it to remove certain wrong bases and insert correct ones. This ensure that the DNA is copied correctly
What is the DNA process?
DNA synthesis or DNA replication
When DNA cynthesis occures?
Within the Cell cycle, Dna synthesis occurs during the S [synthesis] phase.
How would prevention of DNA synthesis affect mitosis?
There would not be enough DNA to put in daughter cells, since DNA synthesis is the replication of DNA.
