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Answers. Relevance. Rating Newest Oldest. Best Answer: The nuclear membrane is the same thing as the nuclear envelope. It keeps the contents of the nucleus separate from the rest of the cell. The nuclear membrane does have pores that allow ribosomes and mRNA to leave the nucleus on their way to the cytoplasm.It's also interesting that the nuclear membrane is double-two membranes together, actually.Source(s):t keeps the contents of the nucleus separate from the rest of the cell. The nuclear membrane does have pores that allow ribosomes and mRNA to leave the nucleus on their way to the cytoplasm. It's also interesting that the nuclear membrane is double-two membranes together, actually. Source(s):
This is why the nucleus is sometimes referred to as the control center, or the brain, of the cell. Since large molecules cannot get inside the nucleus through the nuclear membrane, small holes called nuclear pores dot the surface area of the envelope. These pores regulate the transport of those molecules by carrier proteins embedded in the double layer of the membrane.