An example of an emerging virus isa. phage λ.b. HIV that causes AIDS.c. a strain of influenza virus called H1N1 that causes the flu.d. both b and c.
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An example of an emerging virus is
a. phage λ.
b. HIV that causes AIDS.
c. a strain of influenza virus called H1N1 that causes the flu.
d. both b and c.
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- Which of the statements about bacteriophage is FALSE: a) specialized transduction is a low frequency event b) may accidently package host DNA into a phage particle c) may perform specialized transduction d) only have a lytic life cycleUnderstanding how this virus works can help us defend ourselves against other deadly influenza strains that arise. Critics of the research are concerned: If the virus escapes the containment facilities (even though it has not done so yet), it might cause another pandemic. Worse, terrorists could use the published DNA sequence and methods to make the virus for horrific purposes. Do you think this research makes us more or less safe?The major difference between retrotransposons and retroviruses isa. retrotransposons encode reverse transcriptase.b. retroviruses move from one site in the genome toanother.c. retroviruses encode the env gene, which allows themto move from one cell to another.d. None of the above are correct.
- The drugs used against HIV in AIDS therapy are not effective against the flu because a. HIV is an RNA virus and influenza is a DNA virus. b. HIV is a DNA virus and influenza is an RNA virus. c. the two viruses have different-sized genomes. d. the proteins targeted by HIV drugs are not found in influenza.A plasmid (a) can be used as a DNA vector (b) is a type of bacteriophage (c) is a type of cDNA (d) is a retrovirus (e) b and cPropose an explanation for why during the history of the discovery of viruses they were first called filterable agents, then they were thought to be chemicals and finally, why were they able to finally be identified and given a name. – think about this as it relates to technological advancements
- A" is a retrovirus. It can integrate DNA into random sites of human genome. Another virus "B" can integrate DNA at a specific site of human genome. Which one of these viruses would make a better vector for gene therapy? Briefly explain.Some scientists are trying to engineer bacteriophageto treat bacterial infections in humans when theinfections do not respond to chemical antibiotics.a. What possible advantages might phage therapyhave over antibiotic therapy?b. Describe potential difficulties that would need tobe overcome for phage therapy to succeed.c. How might researchers best confront the issue thatbacterial cells could become resistant to bacteriophage just as they could to antibiotics?An emerging virus isa. a virus that has arisen recently and is more likely to cause infectionthan previous strains.b. HIV that causes AIDS.c. a strain of influenza virus called H1N1 that causes the flu.d. all of the above.
- Which of the following does NOT inititiate DNA synthesis ? (correct answer e) a. a single-stranded DNA virus. b. a (-) single stranded RNA virus c. a (+) single stranded RNA virus d. a double-stranded DNA virus (Poxviridae) e. Both (-) and (+) single-stranded RNA virusesEmerging viruses arise by(A) mutation of existing viruses.(B) the spread of existing viruses to new host species.(C) the spread of existing viruses more widely within their hostspecies.(D) all of the above.Which of the following is NOT used to treat active viral disease? a. Vaccines b. Antiviral drugs c. Antibiotics d. Phage therapy
