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- Question
The lysogenic state is governed by the activity of the regulatory region of the lambda phage genomes; this region is termed as
Options- A. immunity repressor
- B. immunity operon
- C. operon repressor
- D. none of these
- Correct Answer
- immunity operon
- 1. The first step in infection of a host bacterial cells by a phage is
Options- A. adsorption
- B. absorption
- C. penetration
- D. replication Discuss
- 2. Viruses require __________ for growth.
Options- A. bacteria
- B. plants
- C. animals
- D. living cells Discuss
- 3. A change from lysogeny to lysis is generally induced by
Options- A. ultraviolet light
- B. chemicals
- C. irradiation
- D. all of these Discuss
- 4. When a virus enters a cell but does not replicate immediately, the situation is called
Options- A. lysogeny
- B. fermentation
- C. symbiosis
- D. synergism Discuss
- 5. Which of the following is continuous cell line?
Options- A. HeLa
- B. HEp-2
- C. KB
- D. All of these Discuss
- 6. Which of the following viruses belong/s to family caliciviridae?
Options- A. Hepatitis B virus
- B. Hepatitis D virus
- C. Hepatitis E virus
- D. All of these Discuss
- 7. Which of the following virus is susceptible to chloroform?
Options- A. Herpes
- B. Influenza
- C. Measles
- D. All of these Discuss
- 8. 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
- 9. Plant viruses may be cultivated in
Options- A. tissue culture
- B. cultures of separated cells
- C. whole plants
- D. all of these Discuss
- 10. 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
Viruses problems
Search Results
Correct Answer: adsorption
Correct Answer: living cells
Correct Answer: ultraviolet light
Correct Answer: lysogeny
Correct Answer: All of these
Correct Answer: Hepatitis E virus
Correct Answer: All of these
Correct Answer: continue to replicate
Correct Answer: all of these
Correct Answer: lysogeny
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