BME365S_Homework7_2010

BME365S_Homework7_2010 - 2010 BME 365S Homework 7 KEY Due...

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2010 BME 365S Homework 7 KEY Due in class Apr 27, 2010 1. What’are’the’differences’between’bacter ia’and’viruses?’Name’at’least’3 .’ Bacteria Viruses Structure Cells; usually surrounded by cell wall Not cells; nucleic acid cord with protein coat Living Conditions Most can survive and reproduce outside a host Parasitic; must have a host cell to reproduce Susceptibility to drugs Most can be killed or inhibited by antibiotics Cannot be killed with antibiotics; some can be inhibited with antiviral drugs 2. Describe’the’process’by’HIV’infects’and’hijacks’a’cell±s’machinery. HIV enters cell by adsorption of glycoproteins on its surface to receptors on target cells followed by fusion of viral envelope with the cell membrane. The HIV capsid is released into the cell. Reverse transcriptase copies the viral RNA into cDNA. cDNA and its complement form ds DNA and travels into the cell nucleus, and is integrated into the host cell’s genome. Viral DNA is transcribed into mRNA, and in turn viral proteins are produced. Viral RNA and associated proteins are packaged and released.
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BME365S_Homework7_2010 - 2010 BME 365S Homework 7 KEY Due...

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