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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):
Two Membranes. The mitochondria and nucleus are pouches whose walls are made of two membranes. A mitochondrion has an outer membrane and an inner membrane. A nucleus also has an outer membrane and an inner membrane. The two membranes of a mitochondrion serve different purposes. The inner membrane is where energy molecules are made. For the nucleus, its outer membrane is connected to the endoplasmic reticulum, another membranous organelle.