BIOL 120 Lecture Notes - Lecture 9: Ferredoxin, Electric Motor, Proteobacteria
Document Summary
Bmsc 220. 3 cell biology. Topic 9: mitochondria and plastids. Topic overview: mitochondria, basic morphology and organization, biogenesis and protein import, bioenergetics, regulation of function, disorders, plastids and peroxisomes. Textbook readings (5th edition: chapter 11, pages 433- 453, 464- 468. Phospholipids are carried to mitochondria from the endoplasmic reticulum by phospholipid transfer proteins. Internal peroxisomal proteins are synthesized on free ribosomes in the cytosol and imported into peroxisomes as complete polypeptide chains. Structure of a mitochondrion: double membrane bound cytoplasmic organelle. It increases resistance: 80% protein (by weight; highest of any cellular membrane), has cristaes which folds the inner membrane. The number of cristae varies with energy of proton movement across the membrane. demands of the cell: the matrix: General features of mitochondria: variation in shape and intracellular organization, endosymbiotic origin, capable of division and fusion. Variation in shape and intracellular localization. Shape is the stereotypical oval or circular shape. Localized predominantly through cytoskeletal association and can move around the cell.
