Chapter 18 - Bacteria and virus notes

Chapter 18 - Bacteria and virus notes - CHAPTER 18 VIRUSES...

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CHAPTER 18 VIRUSES Alive? Made  of  NUCLEIC ACID  surrounded  by   PROTEIN COAT Tiny:  smaller  than  riboso m e s Can  be  double/single  stranded Can  have  DNA/RNA Protein  shell  =  CAPSID Som e  have   ENVELOPES  around  capsid  that aid  in host  infection BACTERIOPHAGES -viruses  that infect  bacteria   Have  no  cellular  machinery  of their  own  Can  only  reproduc e  in host  cells RETROVIRUSES    EX: HIV (AIDS  virus)      Have  RNA for genetic  code         Contain   REVERSE TRANSCRIPTASE  enzym e             ~ uses  viral RNA to make  a comple m e ntary  DNA used  by  host  cell      Enzyme  used  as  a  genetic  tool to turn eukaryotic  mRNA  into DNA              that can  be  incorporated  and  transcribed  by  bacteria TWO KINDS OF LIFE CYCLES PRIONS  = Misshaped  infectious  proteins Caus e  misfolding  in proteins  they  contact Affect  brain;  untreatable  and  fatal
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This note was uploaded on 02/14/2012 for the course BIO 151 taught by Professor Grinblat during the Fall '08 term at University of Wisconsin.

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Chapter 18 - Bacteria and virus notes - CHAPTER 18 VIRUSES...

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