Predict how doubling the length of the sides of a cube-shaped cell would affect

the cell's ability to move nutrients to all parts of its cytosol.

Increasing the size of the cube-shaped cell increases the volume. However, the surface area-to-volume ratio decreases. This means that the simple diffusion would take more time distribute nutrients across the cell (and even in the eliminate waste). It would need bulk transport such as vesicle transport, otherwise cell activities would slow down.