Viruses problems
- 1. The viruses in an attenuated vaccine
Options- A. have no genome
- B. continue to replicate
- C. are usually larger than bacteria
- D. is altered with chemicals Discuss
Correct Answer: continue to replicate
- 2. Plant viruses may be cultivated in
Options- A. tissue culture
- B. cultures of separated cells
- C. whole plants
- D. all of these Discuss
Correct Answer: all of these
- 3. The viral DNA of the temperate phage, instead of taking over the functions of the cell's genes, is incorporated into the host DNA and becomes a prophage in the bacterial chromosome, acting as a gene. This happens in
Options- A. lysogeny
- B. spontaneous induction
- C. lytic phase
- D. none of these Discuss
Correct Answer: lysogeny
- 4. Which of the following is semi-continuous (diploid) cell line?
Options- A. HeLa
- B. HEp-2
- C. WI-38
- D. KB Discuss
Correct Answer: WI-38
- 5. The viral DNA is removed from the host's chromosomes and the lytic cycle occurs. The process is called
Options- A. spontaneous induction
- B. inductive infection
- C. resultant induction
- D. spontaneous infection Discuss
Correct Answer: spontaneous induction
- 6. Enveloped viruses have a __________ shape.
Options- A. icosahedral
- B. helical
- C. roughly spherical
- D. complex Discuss
Correct Answer: roughly spherical
- 7. Which of the following viruses belong to family Flaviviridae?
Options- A. Rubella virus
- B. Yellow fever virus
- C. Hepatitis C virus
- D. All of these Discuss
Correct Answer: All of these
- 8. Enzyme neuraminidase is carried by which of the following viruses?
Options- A. Human immunodeficiency virus
- B. Epstein-Barr virus
- C. Influenza virus
- D. Adenovirus Discuss
Correct Answer: Influenza virus
- 9. In order for a virus to replicate
Options- A. the capsid must enter the host cell cytoplasm
- B. the host cell must be undergoing mitosis
- C. the genome must be released in the cytoplasm
- D. the host cell must lack a cell membrane Discuss
Correct Answer: the genome must be released in the cytoplasm
- 10. The size of viruses is usually measured in
Options- A. centimeters
- B. micrometers
- C. nanometers
- D. millimeters Discuss
Correct Answer: nanometers
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