CELL STRUCTURES AND FUNCTION
CELL CYCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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To see if the cell has grown enough
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To see if the DNA was correctly replicated
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To make sure the cell does not have cancer
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To make sure that the enzymes aren’t amalyzed
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Detailed explanation-1: -The G1 checkpoint. The G1 checkpoint is located at the end of G1 phase, before the transition to S phase. If cells don’t pass the G1 checkpoint, they may “loop out” of the cell cycle and into a resting state called G0, from which they may subsequently re-enter G1 under the appropriate conditions.
Detailed explanation-2: -The primary G1/S cell cycle checkpoint controls the commitment of eukaryotic cells to transition through the G1 phase to enter into the DNA synthesis S phase.
Detailed explanation-3: -Once the cell passes the G1 checkpoint, the cell becomes committed to the cell cycle and enters the S phase where DNA is replicated. The checkpoint is to ensure the cell has grown enough and has enough resources to begin DNA replication.
Detailed explanation-4: -The G1/S checkpoint will monitor DNA damage prior to the cell entering the S phase for replication. Following replication during S phase, the G2/M checkpoint ensures DNA replication happened correctly.
Detailed explanation-5: -G1 (restriction) checkpoint. The G1 checkpoint, also known as the restriction point in mammalian cells and the start point in yeast, is the point at which the cell becomes committed to entering the cell cycle.