7.012 Lecture Notes - Lecture 7: Cell Membrane, Tahiti, Eukaryote
Document Summary
Membranes are the boundaries of cells, made up of a lipid bilayer. All membranes are topologically spherical (see diagram above) Prokaryotic cells: 1 compartment made of a single membrane tah tsurrounds cell. Dna and cytoplasm are all in compartment e. g bacteria. Most bacteria have a cell wall which is surrounded by a plasma membrane. The plasma membrane denotes the boundary of the cell. It separates the inside of the cell from the outside of the cell. The dna in bacterial cells is ~1mm in length, however the cell is only 2~2um in length dna is coiled and folded in cell. Glycolysis takes place in the cytoplasm of all organisms (prokaryotes and eukaryotes) Eukaryotic cell called organelles) are also surrounded by membranes. Cells are defined by the outer plasma membrane. Plasma membrane made up of a lipid bilayer. Nucleus and mitochondria are each enclosed by 2 membranes (inner and outer)
