51. 1102 Viruses 10 - Viruses What is a prophage? A. A...

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Viruses Foot and mouth virus What is a prophage? A. A phage genome that has integrated into the DNA of a bacterium B. A phage genome, before it has integrated into the DNA of a bacterium C. a phage that is propelled out of an infected bacterium D. a phage in which the proteins begin with proline, rather than methionine E. a phage with a propensity toward the lysogenic cycle * Defining life is difficult Viruses straddle the boundary between the quick and the dead Data: This infectious agent cannot be filtered or cultivated on media Conclusion: It is a new form, not bacterial. How convincing is this? (Very) generalized life cycle of a virus
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Lytic cycle of phage T4 L and lysogenic cycles of phage λ (lambda) IV and V replicate RNA --> RNA Requires RNA-dependent RNA polymerase RNA --> DNA Requires RNA-dependent DNA polymerase (reverse transcriptase) These are almost never host enzymes RNA Animal Viruses Draw the cycles on your own for all 3 virus types. Describe how new RNA and virus protein are made. Life cycle of an enveloped RNA virus * This reaction requires RNA-dependent RNA polymerase. Where does it come from and at what point is it synthesized?
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51. 1102 Viruses 10 - Viruses What is a prophage? A. A...

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