The Cell: A Molecular Approach

Fourth Edition

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Chapter 9: The Nucleus

Video 9.1  Nucleus and Nucleolus

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The nucleus is often the largest organelle in a cell, and it contains one or more nucleoli. This segment shows nuclei and nucleoli in Amoeba and the alga Spirogyra. The nucleus contains the chromatin, which condenses into chromosomes prior to mitosis (nuclear division). (7.4 MB) [© Cytographics.]