MICRB265 Lecture Notes - Lecture 2: Intracellular Parasite, Veterinary Virology, Dna Virus
2 Sep 2018
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2. 1 virus structure: structural components of a virion: 1: capsid: protein coat, genetic material: dna or rna, animal viruses may have a _________________ produced by budding from host cell, bacterial viruses are naked. Figure 8. 1: viral genomes are, rna or dna, single-stranded or double-stranded, linear or circular, smaller than cell genomes, genome size proportional to _______________________________ Figure 8. 2: some viruses carry enzymes inside their capsids, bacterial viruses may carry enzymes to help break through. _____________________: rna viruses carry polymerases to _______________________________ upon infection. 2. 2 bacteriophage: bacterial viruses are called bacteriophage, wide variation in composition and structure, two different life cycles possible, lytic phage, also called virulent phage, carry out only a lytic life cycle, turns host cell into viral factory. Figure 8. 8: phage therapy as an alternative to antibiotics, phage infect bacteria that are causing illness, bacteria are lysed and killed infection cured, lysogenic phage:
