BIOL 2013 1st Edition Lecture 11Outline of Last LectureI. eukaryotic microorganisms cont.II. malariaOutline of Current LectureI. virusesII. components of virusesIII. virus specificityIV. virus shapesV. virus replicationVI. virus life cyclesCurrent LectureI. virusesA. abiotic intracellular parasites1. abiotic becausea) not cellularb) need a host cell to replicatec) can’t generate ATPThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.d) no ribosomes so they can’t produce proteinse) contain one nucleic acidf) no metabolismB. their only purpose is to replicateC. they aww very small1. only electron microscopes can view themII. components of virusesA. nucleic acid1. double stranded or single stranded DNA2. double stranded or single stranded RNA3. most are single stranded RNAB. capsid1. protein coat surrounding the nucleic acid made of tiny sprees called capsomeres2. its main function is protection and she of the virus3. contains the receptor sites for viruses with no envelopeC. envelope1. surrounds the capsid2. contains the receptor sites for the host cell3. viruses with a capsid and no envelope are called naked virusesIII. virus specificityA. animal and plant virusesB. bacterial virusesIV. virus shapesA. helical: long rods (rigid or flexible)B. polyhedral: many sidedC. complex viruses: space ship (bacteriophages)V. virus replicationA. they enter the cell by fusion and leave the cell by buddingVI. virus life cyclesA. lytic: a viral life cycle in which the virus lyses the cell releasing progenyB. lysogeny: a viral life cycle in which the viral genome integrates into and replicates with the host genome1. it can revert to the lytic
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