BIOL 1114 Lecture Notes - Lecture 5: Cell Theory, Organism, Nucleoid
Document Summary
Cells: are extremely diverse, nearly all require a microscope to be seen, each type in our body is specialized for a particular function. Invented in 1930s: overcomes limitations by using beam of electrons. Marks boundary between outside and inside of a cell. Regulates passage in and out of a cell. Phospholipid bilayer with embedded proteins: polar heads (hydrophilic) of phospholipids face into watery medium, nonpolar tails (hydrophobic) face each other. Membrane proteins: channel proteins, form tunnel for specific molecules, transport proteins. 4. 3 the two main types of cells: all organisms are composed of cells, all cells come only from preexisting cells. All cells have: plasms membrane to regulate movement of mats, cytoplasm where chem reactions happen, genetic mats for growth and reproduction. 2 main types of cells: based on organization of genetic mats, 1. Prokaryotic cells- lack membrane bounded nucleus: 2.
