Viruses problems
- 1. Viruses can be purified based on their size and density by using
Options- A. gradient centrifugation
- B. differential centrifugation
- C. precipitation
- D. none of these Discuss
Correct Answer: gradient centrifugation
- 2. The yield of phage per bacterium is called the
Options- A. eclipse size
- B. latent size
- C. burst size
- D. none of these Discuss
Correct Answer: burst size
- 3. Inclusion bodies of measles virus are
Options- A. intracytoplasmic
- B. intranuclear
- C. both (a) and (b)
- D. none of these Discuss
Correct Answer: both (a) and (b)
- 4. The extracellular phage number increases until a constant titer at the end of the multiplication cycle. This time interval is termed as
Options- A. eclipse period
- B. rise period
- C. latent period
- D. burst size Discuss
Correct Answer: rise period
- 5. Which of the following oncogenic viruses was first detected?
Options- A. Rous sarcoma virus.
- B. Epstein-Barr virus
- C. Herpes simplex virus type 2
- D. Human T cell leukaemia virus Discuss
Correct Answer: Rous sarcoma virus.
- 6. Which of the following is not true of virions?
Options- A. Reproduce independently
- B. Contain DNA
- C. Contain RNA
- D. Are extracellular Discuss
Correct Answer: Reproduce independently
- 7. Which of the following is an example of rod-shaped viruses having their capsomeres arranged helically and not in the stacked ring?
Options- A. Bateriophage M13
- B. Bateriophage MV-L2
- C. Bateriophage T2
- D. Bateriophage T4 Discuss
Correct Answer: Bateriophage M13
- 8. Which of the following viruses can rescue adenovirus in simian cells?
Options- A. Rabies
- B. Vaccinia
- C. Simian virus 40
- D. Cytomegalovirus Discuss
Correct Answer: Simian virus 40
- 9. The most efficient way to enclose a space is within a/an
Options- A. sphere
- B. cube
- C. icosahedron
- D. helix Discuss
Correct Answer: icosahedron
- 10. Which one is not useful in the treatment of viruses except
Options- A. acyclovir
- B. interferon
- C. penicillin
- D. antibodies Discuss
Correct Answer: penicillin
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