organelle Articles

Cell Nucleus

By Valerie C. Scanlon, PhD and Tina Sanders on April 20th 2008

With the exception of mature red blood cells, all human cells have a nucleus. The nucleus is within the cytoplasm and is bounded by a double-layered nuclear membrane with many pores. It contains one or more nucleoli and the chromosomes of the cell.
A nucleolus is a small sphere made of DNA, RNA, and protein. The […]

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Filed Under: Anatomy, Physiology, Principles
Tags: chromatin, chromosomes, DNA, nucleoli, organelle, protein, Red blood cells, RNA

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