BIOSC 0150 Lecture Notes - Venison, Antiviral Drug, 1918 Flu Pandemic
14 May 2013
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Viruses pathogen that"s smaller and simpler than bacteria. Cannot reproduce or carry out metabolic activities outside host cell viruses aren"t alive. Grey area not quite alive, but more than simple chemicals. Basic structure nucleic acid surrounded by a protein coat. Form of genetic material viruses double strand/single strand dna or rna. Viruses categorized based on type of nucleic acid. Accessory structures like membranous envelope and glycoproteins. Influenza viruses viral envelope made of host cell membranes. Envelopes on animal viruses help them enter host cells. Viral glycoproteins bind to receptor molecules on host cells. Inside host cells, new viral capsids are wrapped in membrane as they bud from the cell. Metabolic enzymes and ribosomes (which make protein) Therefore they replicate in host cells host cell gets replicate: limited number of host species, lock and key recognition system fit between receptor molecules on host cells and viral surface proteins.
