CELL STRUCTURES AND FUNCTION
CELL CYCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The daughter cell would be small and possibly not able to store enough nutrients within the cell to survive. It can also cause cancer.
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The DNA in the daughter cells would not be able to complete and the cells would not survive.
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The chromosomes might end up in the wrong daughter cell. For example, one cell might get both copies of chromosomes while the other gets none.
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None of the above
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Detailed explanation-1: -the G1 checkpoint is the point in the cycle where the cell goes into or out of G0. Predict the result of a mutation that allows a cell to move past checkpoint G1 even though the cell has not grown sufficiently. the daughter cell would be small and possibly not able to store enough nutrients within the cell to survive.
Detailed explanation-2: -Predict the result of a mutation that allows a cell to move past checkpoint M even though the chromosomes were not prepared for division. the chromosomes might end up in the wrong daughter cell. for example, one cell might get both copies of a chromosomes while the other gets none.
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: -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. At the G1 checkpoint, cells decide whether or not to proceed with division based on factors such as: Cell size.
Detailed explanation-5: -Which mutation would allow the cell to pass the G1 checkpoint when it should not? A mutation in Rb, preventing it from associating with E2F.