BIOL 102 Lecture Notes - Lecture 10: Sterol, Peroxisome, Phagocytosis
Document Summary
The interior of a eukaryotic cell is packed with membranes that form an elaborate internal, or endomembrane system. Divides cell into compartments, channeling passage of molecules through interior cell, and provides durfaces for synthesis of lipids and proteins. Rough er: gets its name from the pebbly appearance of its surface. Proteins are synthesized on the surface: destined to be exported, sent to lysosomes or vacuoles, or embedded into the plasma membrane. Enter cisternal space on first step of path to destination. Newly synthesized proteins can be modified by the addition of short-chain carbohydrates to form glycoproteins. Sorts proteins for plasma membrane, vacuoles, lysosomes. Smooth er: regions of the er with few bound ribosomes. Involved in the synthesis of a variety of carbohydrates and lipids. Majority of lipids are assembled here and sent out to where needed. Membrane proteins in the plasma membrane and other cellular membranes are inserted by ribosomes on the rer.
