BIOL 1011 Lecture : Lecture 22 Specific Defenses Of The Host
Document Summary
Lecture 22 the viruses chapter 14. 1-14. 5: general characteristics, viral size, viral structure, viral replication. Bacterial viruses: t4 and , animal viruses replication. Retroviruses hiv: taxonomy of viruses. Viruses: definition, a virus is a small particle consisting of a nucleic acid molecule surrounded by a protein coat. Animal viruses protein coat may be encased in envelope of bilayer lipid: viruses can only replicate inside a host cell. Intracellular state: virus particle also called a virion. Virus size: size range between 20 nm to 1000 nm (few 10,000nm)- need electron microscope to see. It may be either dna or rna. It may be single stranded or double stranded. A lipid bilayer that surrounds the capsid. Lipid usually derived from the cytoplasmic membrane of the host. Envelope virus may or may not be covered with spikes. Virion often carries enzymes that are injected into the host at the same time viral"s nucleic acid. Aids taking over host, or aids viral dna to.
