NATS 1670 Lecture Notes - Lecture 14: Lipid Bilayer, Endoplasmic Reticulum, Electron Microscope
2 Dec 2017
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Prokaryotes do not have a nucleus but eukaryotes do. The eukaryotic cell: plasma membrane, cytoplasm, mitochondria (powerhouses of the cell, endoplasmic reticulum, the nucleus. Plasma membrane: flexible, separates the inside of the cell from the outside environment, provides a surface on which chemical reactions occur, regulates the passage of materials inside/outside the cell, separates cells from one another. Hydrophobic: means hates water (tails of phospholipids: the head group, the phosphate and glycerol is polar and hydrophilic. From both sides of the membrane: the long tail is non-polar and hydrophobic. Eukaryotes can be single-celled or multicellular (such as a dog): humans are eukaryotes. Along with plants and animals: fungi are also eukaryotes, dna is contained inside the nucleus, the three most important organelles in a eukaryotic cell are the nucleus, mitochondria and chloroplasts. Kernel or nut, which is interpreted to be the nucleus.
