Question

select the correct answer. a model cell with damaged dna was created to explain the importance of checkpoints in a cell cycle. the g2 checkpoint accidentally failed to work during experimentation. what do you think is the likely consequence of this failure?
a. the cell divided and created two cells with repaired dna.

b. the cell couldn’t divide, and cell division stopped.

c. the cell died before it could complete division.

d. the cell divided and created two nonidentical cells.

e. the cell continued to divide uncontrollably to create more damaged cells.

Explanation:

The G2 checkpoint checks for DNA damage and ensures it is repaired before entering mitosis. If it fails with damaged DNA, the cell will proceed to divide. Since the DNA is damaged and not repaired, the two daughter cells will have non - identical (due to damaged DNA) genetic material. Option A is wrong as DNA is damaged and not repaired. Option B is wrong as the G2 checkpoint failure doesn't stop division. Option C is not the likely consequence of G2 checkpoint failure. Option E is more related to a failure of tumor suppressor genes or other mechanisms, not just G2 checkpoint failure. So the cell will divide and create two nonidentical cells.

Answer:

D. The cell divided and created two nonidentical cells.