Page 96 - Radiation Safety

Nucleus

• The cell nucleus has 2 main functions :

to control chemical reactions in the cell cytoplasm,

to store information needed for when the cell devides

• Structure :

contains nucleoplasm - a highly viscous solid containing the

chromosomes and nucleoli. Chromosomes contain

information encoded in DNA attached to proteins called

histones and are usually arranged in to a dense network

called chromatin.

Nucleoli are granular structures which make ribonucleic DNA

(rDNA) and assemble it with proteins.