What happens at the first checkpoint of the cell cycle (after G1)?
A. The nutrient level in the cell is checked to see if there is an adequate nutrient supply.
B. The size of the cell is checked to determine if the cell is large enough at that point.
C. The plasma membrane of the cell is checked to make sure it is intact.
D. The genetic information of the cell is checked to see if the DNA is undamaged.