01:447:390 Lecture Notes - Lecture 17: Rna Virus, Virus, Peptidoglycan
Document Summary
Chapters 8 and 9: viruses and virology- lecture 17. Viruses are a driving force of evolution and control populations. Virus: genetic element that cannot replicate independently of a living (host) cell: ex. of genetic elements: chromosomes, plasmids, transposal elements. Classification of viruses: viral genomes: nature of the genome. Viral hosts: bacterial viruses (bacteriophages, archaea viruses, animal viruses, plant viruses, fungal viruses, protozoa viruses do different jobs. material. They are used as tools in the lab. Retroviruses flip back and forth between dna and rna. The nature of the genome dictates how molecular events will occur: viruses need different enzymes to. Viruses are made out of proteins, nucleic acids, peptidoglycan, lipid envelope (can be derived from host) Nucleocapsids constructed in highly symmetric ways: helical symmetry: rod-shaped virus (ex. Length of virus determined by length of nucleic acid. Width of virus determined by size and packaging of protein subunits: icosahedral symmetry: (ex. polio virus)
