BIOL 319 Lecture Notes - Lecture 12: Tobacco Mosaic Virus, Viral Hemorrhagic Fever, Rabies Virus
20 Apr 2017
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**be able to describe classes of viral genomes and cite an example of each for exam. They consist of many classes and affect different species. Tissue tropism: only affect certain types of cells, such as heart, liver, brain, etc. Components of viruses: virion: nucleic acids: linear or circular dna or rna. Usually at center of core: caspids: protects and encloses nucleic acid. Morphologies of viruses: polyhedral: each face composed of same genes, structure has rotational symmetry, not an envelope virus, helical: have a capsomere, envelope, and spikes. Space between envelope and capsid may contain tegument proteins: tobacco mosaic virus, tailed bacteriophages ~ symmetrical, filamentous, ebola, amorphous: not symmetrical, nucleic acids are within a flexible core wall composed of enzymes that can be used later on. Classifies viruses based on type of genome (most important), nucleic acid type and structure, method of replicaion, and host range. Group 1: double-stranded dna that is transcribed to mrna once it gets inside the host.
