BIOL 1010 Lecture Notes - Adolf Mayer, Dna Virus, Enterobacteria Phage T4
Document Summary
In 1883 adolf mayer found the mosaic disease of tobacco could be passed from plants to plant via spraying sap extracted from infected plants. In 1897, martinus beijernick discovered that this infectious agent could be passed from one infected plant to the other eventually it could reproduce itself. In 1935, wendell stanley crystallize the infectious particle now known as tobacco mosaic virus (tmv) A virus is a submicroscopic infectious particle composed of a protein coat and a nucleic acid core. Viruses like cells, carry genetic information encoded in their nucleic acid, and can undergo mutation and reproduce. However, they can not carry out metabolism. Viruses are classified b the type of nucleic acid they contain, and the shape of their protein capsule. A protein shell that encloses the viral genome is called a capsid. Depending on the type of the virus capsid may be: rod shaped, polyhedral, complex.
