Final answer:
The G2 phase before mitosis involves the cell synthesizing proteins necessary for chromosome manipulation and duplicating certain organelles to prepare for cell division.
Step-by-step explanation:
During the G2 phase of the cell cycle, just before mitosis, a cell focuses on the final preparations for nuclear division. In this phase, the cell makes several crucial components, including proteins necessary for chromosome manipulation. These proteins are vital for the structuring, organization, and movement of chromosomes during mitosis. Additionally, the cell will replicate some organelles and dismantle the cytoskeleton to resource the building of the mitotic spindle. This intensive preparation ensures the cell is equipped to enter the first stage of mitosis and successfully complete the cell division process.