BIOB10H3 Lecture Notes - Lecture 1: Antonie Van Leeuwenhoek, Matthias Jakob Schleiden, Theodor Schwann
Document Summary
Study of cells at microscopic and molecular level. Found that cork is made up of cells . Examined pond water under microscope and found animalcules (things like ameoba) Matthias schleiden (1838), theodor schwann (1839) and rudolfvirchow(1855) **proposed the cell theory: all organisms are composed of one or more cells, cell is the structural unit of life, cells can exist only by division from a preexisting cell. Basic properties of cells: cells are highly complex and organized, cells possess a genetic program and means to use it (dna rna protein, cells are capable of producing more of themselves, mitosis and meiosis. Transport materials inside cell (intracellular transport) assemble/dissemble structures. Use surface proteins on cell to do this. Genetic changes that lead to cellular changes that are beneficial; retained in future generations. Has nucleoid (not bounded by a membrane) Less dna than eukaryotes (usually single circular chromosome) **entire cell splits in half into 2: eukaryotes.
