Multiple Choice: Choose the correct letter. There is only one correct answer. 1.
ID: 181569 • Letter: M
Question
Multiple Choice: Choose the correct letter. There is only one correct answer.
1. One positive use of viruses is their function as
a. infectious particles. c. cloning vectors.
b. pandemic initiators. d. marine predators.
2. Which of the following facts supports the argument that viruses are living?
a. Viruses lack metabolism for energy and biosynthesis.
b. Viruses are capable of being crystallized.
c. Some living pathogenic bacteria contain degenerate genomes and rely significantly on a
host.
d. Viruses cannot replicate without a host.
3. Which of the following is NOT a possible effect of viral replication in the host cell?
a. death of the cell c. debilitation of the cell
b. differentiation of the cell d. alteration of the genome of the cell
4. ________ is an example of a virus that causes major economic losses in the agriculture industry.
a. Tobacco mosaic virus c. HIV
b. Measles virus d. Influenza
5. West Nile virus is capable of infecting many different organisms (humans, birds, raccoons, and so on).
Based on this information, which of the following statements correctly describes West Nile virus?
a. West Nile virus has a narrow host range.
b. West Nile virus has a broad host range.
c. West Nile virus has a narrow tissue tropism.
d. West Nile virus is capable of fecal-oral transmission.
6. How is HPV able to keep its genome so small?
a. overlapping reading frames c. antigenic shift
b. oncogenic transformation d. HPV does not have a small genome.
7. Replication of HPV is activated when
a. the DNA is uncoated. c. integrating into the host genome.
b. infecting basal cells. d. keratinocytes differentiate.
8. What type of HPV causes cancer?
a. all types of HPV c. some types of latent HPV
b. no types of HPV d. all types of actively replicating HPV
9. Why would a virus have evolved to cause cancer in a host cell?
a. to kill the host cell
b. to produce more cells for the virus to infect
c. to allow for increased mutagenesis of the virus
d. Viruses are not capable of causing cancer in a host cell.
10. What type of HPV can be eliminated from the body by the host immune system?
a. oncogenic HPV c. all HPV
b. nononcogenic HPV d. no HPV
11. Segmented influenza RNA genomes are capable of
a. reverse transcription. c. reassortment.
b. cell fusion. d. proviral transposition.
12. Which of the following statements regarding the influenza virus is FALSE?
a. The genome of influenza is very tiny to allow the generation of as many virions as
possible.
b. The influenza genome maximizes gene reassortment.
c. The genome of influenza is well designed for evasion of the immune system.
d. The influenza genome allows for large quantities of virions to be created for continued
infection.
13. Which of the following stages of the influenza infection cycle is inhibited by Tamiflu?
a. the coating of the capsid envelope
b. the assembly of the capsid
c. the cleaving of the host receptor and release of the virus by budding
d. the packaging of viral genome segments and exit from the nucleus
14. Why must influenza have highly efficient host-to-host transmission?
a. because of its rapid infection c. because of genetic reassortment
b. because of its slow infection d. because of latent infection
15. What is the cure for infection with HIV?
a. vaccine c. antiviral drugs
b. radiation d. There is no cure for HIV.
16. A small subset of the human population does not express the CD4 and CCR5 receptors. To what virus are these individuals naturally immune?
a. HIV c. influenza
b. HPV d. hepatitis
17. Which of the following features of HIV is a big reason as to why thus far it cannot be cured?
a. It is a retrovirus. c. It contains integrase.
b. It contains a viral envelope d. It contains a protease.
18. Which of the following viruses is capable of causing a syncytium?
a. hepatitis c. HPV
b. influenza d. HIV
COMPLETION: Fill in the blank with the correct word.
19. Human papillomavirus contains a ________ genome.
20. Influenza contains a ________ genome.
21. A retrovirus that causes infections progressing slowly over many years is a ________.
Explanation / Answer
Q 1). Correct answer is option (c).
One positive use of viruses is their function as cloning vectors.
Phage DNA is used as a vector for cloning foreign DNA into host cells in recombinant DNA technology.
The company policy does not allow us to answer more than one question in one go. Therefore, rest of the answers need to asked separately.
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