Sunday, January 2, 2011

Nucleus


This organelle is the control center of the cell. It stores and protects DNA from the outside. It is made of three parts: nuclear membrane, nucleolus, and chromosomes. All this together is called the nuclear envelope. The nuclear membrane is perforated by nuclear pores which connect the inner and outer membrane of the nuclear envelope. These nuclear pores regulate the entry and exit of most proteins and RNA, as well as macromolecules.

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