8.1.2 Internal Architecture contrast to the cytoplasm, the nucleus. not individually enclosed by membranes not visible using conventional light or electron microscopy techniques
8.1.2 Internal Architecture contrast to the cytoplasm, the nucleus: ❖not individually enclosed by membranes ❖not visible using conventional light or electron microscopy techniques
revised picture of nuclear structure Nuclear matrix: a proteinaceous scaffold-like network Nucleolus: the center for synthesis and processing of rRNA molecules
revised picture of nuclear structure • Nuclear matrix: a proteinaceous scaffold-like network • Nucleolus: the center for synthesis and processing of rRNA molecules
8.2 The Nuclear Envelope The separation of a cells genetic material from the surrounding cytoplasm may be single most important feature that distinguishes eukaryotes from prokaryotes
8.2 The Nuclear Envelope • The separation of a cell’s genetic material from the surrounding cytoplasm may be single most important feature that distinguishes eukaryotes from prokaryotes
Structure of the nuclear envelope perinuclear space
Structure of the nuclear envelope • outer nuclear membrane • inner nuclear membrane • nuclear lamina • perinuclear space • nuclear pore
Cytoplasm Integral protein Outer membrane Ribosome Inner membrane Nuclear pore complex ER Intermembrane Lamina space Heterochromatin (a) NPC NM. 4 (b) 0.2um