Biology / Bio 0263 · Atom · ~20 seconds
The Nucleus and Nuclear Envelope
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The nucleus houses a eukaryotic cell's DNA and directs ribosome and protein synthesis, enclosed by a double-membrane nuclear envelope studded with pores.
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Nuclear pores control passage of ions, molecules, and RNA between the nucleoplasm and the surrounding cytoplasm.
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The nuclear envelope is two phospholipid bilayers, not one — an inner and an outer membrane, continuous with the endoplasmic reticulum.