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- Question
Which of the following viruses belong to family Hepadnaviridae?
Options- A. Hepatitis A virus
- B. Hepatitis B virus
- C. Hepatitis D virus
- D. All of these
- Correct Answer
- Hepatitis B virus
- 1. During the first 10 minutes after injection of phage DNA, no phage can be recovered by disrupting the infected bacterium. This is termed as
Options- A. eclipse period
- B. rise period
- C. latent period
- D. burst size Discuss
- 2. The envelope of an enveloped virus is derived from
Options- A. the mitochondrion of the cell
- B. the cell membrane
- C. the endoplasmic reticulum of the cell
- D. none of these Discuss
- 3. The function of a viral capsid is
Options- A. protection against the viral genome from physical and enzymatic destruction
- B. providing binding sites that enable the virus to attach to specific receptor sites on the host cell
- C. serving as a vehicle of transmission from one host to another
- D. all of the above Discuss
- 4. The most popular indirect method of counting virus particles is by
Options- A. hemagglutination assay
- B. plaque-assay
- C. counting plaque-forming units
- D. colony counting Discuss
- 5. The most complex type of bacterial viruses having hexagonal head, a rigid tail with a contractile sheath and tall fibers is morphologically classified as
Options- A. A
- B. B
- C. C
- D. D Discuss
- 6. Lesions on chorioallantoic membrane are produced by
Options- A. Herpes B virus
- B. Vaccinia virus
- C. Herpes simplex virus
- D. all of these Discuss
- 7. Which of the following virus is enveloped?
Options- A. Adeno
- B. Herpes
- C. Polio
- D. None of these Discuss
- 8. The infected cells continue to reproduce themselves as well as the virus, and the mature virions are extruded from the cell surface continuously over a long period of time. This type of release mechanism is called a
Options- A. productive infection
- B. inductive infection
- C. resultant infection
- D. all of these Discuss
- 9. Bacteriophages have been used widely in genetic research, since they are the smallest and simplest biological entities capable of
Options- A. self-replication
- B. duplication
- C. self-duplication
- D. multiplication Discuss
- 10. The phage components begin to assemble into mature phages only after the synthesis of
Options- A. structural protein
- B. nucleic acid
- C. Both (a) and (b)
- D. amino acids Discuss
Viruses problems
Search Results
Correct Answer: eclipse period
Correct Answer: the cell membrane
Correct Answer: all of the above
Correct Answer: hemagglutination assay
Correct Answer: A
Correct Answer: all of these
Correct Answer: Herpes
Correct Answer: productive infection
Correct Answer: self-replication
Correct Answer: Both (a) and (b)
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