Is The nuclear envelope is more permeable than the cell membrane?

Answer 1

The nuclear membrane is permeable to many small molecules and ions, but not to larger ones. So the short answer is "to let large molecules through".

An example of such a large molecule is messenger RNA (mRNA). If there were no pores, the mRNA would not be able to leave the nucleus, and proteins could not be synthesized.

Other examples are rRNA (the ribosomal RNA molecules that occur in ribosomes), and the different kinds of tRNA (transfer RNA).

Each pore is actually quite elaborate: a nuclear pore complex made up of a number of proteins. These control the entry and departure of molecules into and out of the nucleus.

Answer 2

No. The cell membrane allows things to diffuse through the membrane through both active and passive ways. The nuclear envelope only allows a few things to pass though, like mRNA. The nuclear envelope is much more selective.

Answer 3

No, because the pores of the nuclear membrane separate the nucleus from the rest of the cell. Materials enter the cell through channels in the plasma membrane, or by endocytosis (either pinocytosis or phagocytosis). Some materials can be actively transported across the membrane, while others passively diffuse across the membrane according to a concentration or pressure gradient.

Answer 4

No, the nuclear envelope is less permeable than the cell membrane. The nuclear envelope contains nuclear pores that regulate the passage of molecules in and out of the nucleus, whereas the cell membrane is more selective in what it allows to pass through via various transport proteins and channels.

Answer 5

Yes, due to the existence of highly complex Nuclear Pores.

Answer 6

So ions can move into or out of the nucleolus.

Answer 7

The nuclear envelope is perforated by many nuclear pores that allow certain molecules to move between the nucleus and the rest of the cell, while blocking the movement of other molecules.

Answer 8

no the cell membrane regulates what comes in and out. different proteins in the membrane allow certain things to come in and out. not all cell membranes are the same

Answer 9

cuz it facilitates the exchange of materials from the nucleus and the cytoplasm