NUR1 200 Chapter Notes - Chapter 4: Lipid Bilayer, Nuclear Membrane, Robert Hooke
Document Summary
Robert hooke invented the first microscope and noticed the microstructures of a cork. Leeuwenhoek viewed a living cell: all things are composed of cells, the cell is the basic functional unit of life, cells arise only from preexisting cells, cells carry genetic information in the form of deoxyribonucleic acid (dna). These were a part of the original form of cell theory passed on from parent to daughter cell: viruses are not considered living organisms since they violate tenet 3 & 4. The most general distinction made between living organisms is if the organism is composed of eukaryotic or prokaryotic cells: eukaryotic cells contain a true nucleus enclosed in a membrane, while prokaryotic cells do not contain a nucleus. Every cell has a cell membrane enclosing a semifluid cytosol in which the organelles are suspended. Takes up 25% of the nucleus volume and is identified by a dark spot.
