The nucleus stores genetic information and the ribosomes
use this information to carry out protein synthesis
1.1 The Nuclear Envelope:
The surface of the nucleus is bounded by two phospholipid bilayer
membranes
1.2 Nuclear pores
Passage is restricted primarily to two kinds of molecules:
Proteins moving into the nucleus to be incorporated into nuclear structures or to catalyze nuclear activities.
(2) RNA and protein-RNA complexes formed in the nucleus and exported to the cytoplasm.