MCB 2050 Lecture Notes - Lecture 2: Cytokinesis, Nummelan Palloseura, Nuclear Lamina
Document Summary
No nucleus, only nucleoid, for genome storage. Free ribosomes or attached to rough er. With free ribosomes responsible for soluble proteins that are not associated with membrane, ribosomes on rough er responsible for integral membrane proteins. Nuclear envelope, nuclear pores, and organized internal nuclear structure. Prokaryotes only have a region where the chromosome is located. Proteins are the ones who actually carry out the functions but nucleus controls their transcription level, indirectly affecting their functions. Intermembrane space is continuous with the lumen of rer. Outer membrane is continuous with the inner membrane (joins at the nuclear pore) and the rough er. Inner membrane contains unique protein composition that is distinct from the om. Im has integral proteins that is connected to nuclear lamina. Nuclear lamina give nucleus its rigid shape. Endomembrane system will start at the nuclear envelope since some ribosomes will be found on where they are continuous with the rer.