The nucleus is a membrane-bound organelle within eukaryotes, carrying nearly all of the genetic information. What you might want to keep in mind after watching this video:
I: Usually, cells have one nucleus; they can have none (red blood cells) or more than one (osteoclasts).
II: The nuclear envelope, divided into the inner and outer membrane, separates the nucleus from the cytoplasm.
III: The outer membrane is continuous with the ER; pores allow larger molecules to get carried across the nuclear envelope via specific proteins.
IV: The nuclear lamina lines the inner membrane and is essential for maintaining the structure.
V: The nucleus controls cell division, protein synthesis, controls enzyme synthesis and ribosome production, stores DNA, RNA, and ribosomes, and regulates transcription.
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