What are the types of in vitro virus cultivation systems (Choose all that applies) A. Animal cell culture B. Bird embryos (eggs) C. Using live animals D. Special media made to grow viruses.
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What are the types of in vitro virus cultivation systems (Choose all that applies)
A. Animal cell culture
B. Bird embryos (eggs)
C. Using live animals
D. Special media made to grow viruses.
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- 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.Which measurement is most reasonable for a virus? a. 65 nanometers b. 1 micrometer c. 900 nanometersWhen you performed the phage titer experiment you performed several dilutions of the original stock. Which plate was useful? a. the dilution that produces the plate with no visible virus b. the plate with fewer than 25 viral infections of E. coli c. the plate with the most dense virus d. the plate with between 30 and 300 visible viral infections of E. coli
- A researcher, studying two different animal viruses (A and B) that infect the same cell type, digests away all the protein and transfers the nucleic acid directly into the host cell. Only virus B causes the infection. This suggests: a. Virus A is likely to be a naked virus. b. Virus A is likely to be an enveloped virus. c. Virus A is likely to be a -ssRNA virus. d. Virus A is likely to be a +ssRNA virus. e. Virus A is likely to be a dsDNA virus. And now explain why.Which Baltimore Class of viruses requires RdRp? a. all answers are correct b. III c. IV d. VWhich of the following is NOT used to treat active viral disease? a. Vaccines b. Antiviral drugs c. Antibiotics d. Phage therapy
- Which of the following does NOT inititiate DNA synthesis? 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 virusesList three ways to grow animal virusesWhich statements are accurate regarding properties of viruses? Select allthat apply. a. Viruses are cell structures that are compact and economical.b. Viruses represent active molecules outside the host cell.c. The basic structure of a virus is composed simply of a protein shell.d. Viruses do not contain enzymes for most metabolic processes.e. Viruses contain either DNA or RNA.
- 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 virusesWhich of the following is NOT a feature of genetic reassortment? A) a host cell is coinfected with two different viruses B) different segments of multipartite genomes are mixed C) host range is permanently altered D) two different viruses have nonidentical but overlapping host ranges E) viruses released possess genetic material from two “parent” viruses F) ALL of these are features of genetic reassortmentDiscuss the advantages and disadvantages of the use of the following viruses as vectors a. Retroviruses b. Adenoviruses c. Adeno-associated viruses