Question

What does the G2 checkpoint check for?

a. Cell size, nutrients, molecular signals, DNA integrity
b. DNA integrity, DNA replication
c. Spindle checkpoint
d. All of the above
e. None of the above

Answer 1

The G2 checkpoint ensures chromosomes are properly duplicated and the replicated DNA is not damaged, also assessing cell size and protein reserves before allowing the cell to enter mitosis.

Step-by-step explanation:

The G2 checkpoint is a critical control mechanism in the cell cycle that ensures cells do not initiate mitosis until certain conditions are satisfied. The main functions assessed at the G2 checkpoint include ensuring that all chromosomes have been properly duplicated and that the replicated DNA is not damaged.

If any issues with the DNA are detected, the cell cycle is halted to allow for the completion of DNA replication or the repair of damaged DNA. As part of this process, cell size and protein reserves are also evaluated, much like in the G1 checkpoint, before the cell is allowed to proceed to mitosis.