Cell division is preceded by two growth phases. Besides growth, both G1 and G2—
Responses
A contain checkpoints that determine if the cycle will continue.contain checkpoints that determine if the cycle will continue.
B help move chromosomes to the new daughter cells.help move chromosomes to the new daughter cells.
C produce more chromosomes before the cell divides.produce more chromosomes before the cell divides.
D grow and produce enough cytoplasm to fill two cells
A contain checkpoints that determine if the cycle will continue.
The cell cycle is a series of phases that cells go through as they grow and divide. In eukaryotic cells, the cell cycle consists of four main phases: G1 (first gap), S (synthesis), G2 (second gap), and M (mitosis). G1 and G2 are the two growth phases that occur before cell division.
During G1, the cell grows, carries out normal metabolic processes, and prepares to replicate its DNA. There is a checkpoint mechanism at the end of G1, called the G1 checkpoint (also known as the restriction point), which assesses whether the cell is ready for DNA synthesis. If the cell is not ready or if there are problems such as DNA damage, the cell cycle can be halted.
The S phase follows G1, during which DNA replication occurs so that each new daughter cell will have a complete set of chromosomes.
After DNA synthesis, cells enter the G2 phase, during which they continue to grow and produce the proteins necessary for mitosis. The G2 checkpoint ensures that all of the DNA has been replicated correctly and that the cell is ready to proceed to mitosis.
So, the correct response that describes the role of both G1 and G2 phases besides growth is the one that mentions checkpoints:
A contain checkpoints that determine if the cycle will continue.