Portage Microbiology Exam #6

The HIV surface glycoprotein gp120 binds what host cellular receptor? (multiple choice) {Ans: D. CD4}Described the main underlining differences between the Salk and Sabin polio vaccine {Ans: The Salk vaccine contained an inactivated form of the virus and was injected while the Sabin vaccine contained a live attenuated (weakened) form of the virus and was administered orally}True or False: You would expect to see a viral envelope on a virus infecting a plant cell {Ans: False. The overwhelming majority of animal viruses are enveloped whereas the majority of plant or bacteria-infecting viruses are not}A drug company is trying to develop a new drug that will inhibit the release of newly produced viral particles. Would the drug company target hemagglutin proteins or nauraminidase proteins? Why? {Ans: Neuraminidase because it involves the budding and release of viral particles from the host cell}True or False: Highly infectious viruses undergo genome replication prior to viral attachment and entry. {Ans: False. The viral genome is never replicated before attachment and entry regardless of its level of infectivity.}A virus that infects bacteria is called a _____ and contains a _____ -side polygon capsid (fill in the blank) {Ans: Bacteriophage; 20-sided}Based