Which of the following is an incorrect statement?

Plasmolysis is the shrinking of the cell away from the cell wall.

Cytoplasm is the fluid living content between the plasma membrane and the nucleus.

Some gases can move across the cell membrane by a process called diffusion.

If the medium has exactly the same water concentration as the cell, there will be no net movement of water across the cell membrane.

The nucleus has a multi-layered covering called nuclear membrane.