HTHSCI 1LL3 Lecture Notes - Lecture 7: Lipid Bilayer, Passive Transport, Electrochemical Gradient
8 Feb 2016
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Document Summary
Only a few cells in the body don"t have nuclei i. e rbcs. Most cells have the same general structure. All cell structures enclosed by a plasma membrane. Inside the cell is the cytosol (aqueous environment) with membrane bound organelles i. e mitochondria. Bacteria cells (prokaryotic cells) do not contain a nucleus or membrane bound organelles membranes. Mammalian cells (eukaryotic cells) contain many compartments bound by. Bacterial cells have a plasma membrane, but also a cell wall on top. Components of a cell wall allow us to categorize the bacterium. Genomic dna in bacteria and organelles not in nucleus/membrane . Prokaryotes only have genomic dna while bacteria has genomic and plasmids (circles of dna causing fewer mutations) All cells (prokaryotic or eukaryotic) are enclosed by a plasma membrane, which is a lipid bilayer (2 layers with their polar groups facing the aqueous environment on either side) Polar (hydrophilic) head consisting of phosphate (contact with aqueous environments).
