The cell membrane controls what enters and leaves the cell. There are protein channels within the lipid bilayer (membrane) of the cell. There are carbohydrate chains that hang off of the protein channels that identify each particle around the cell to make sure its what the cell needs, if not it wont let it in.
the plasma membrane
Cell membrane
This would be the nucleus which is like the brain of the cell. it controls it - the nucleus isn't a cell, its part of a cell :)
Cell membrane
The nucleus is the part of the cell that controls all the activities of the cell. The nucleus is like the main office of a factory.
The nucleus is what controls the cell.
nucleus
Cell Membrane
This would be the nucleus which is like the brain of the cell. it controls it - the nucleus isn't a cell, its part of a cell :)
Cell membrane
The semi-permeable part of the cell would be the cell membrane, which allows some molecules (water, in particular) to pass freely through but restricts the movement of other molecules (such as proteins and enzymes).
The answer is nucleus :)
The Nucleus
I think you are talking about the nucleus, which is the "brain" of the cell. It controls everything that cell does.
The nucleus is the part of the cell that controls all the activities of the cell. The nucleus is like the main office of a factory.
The nucleus is what controls the cell.
nucleus
the nucleus.
you