1. When a virus enters a cell but does not replicate immediately, the situation is called
2. Usually viruses are separated into several large groups based primarily on
3. The first step in infection of a host bacterial cells by a phage is
4. Which of the following viruses has not been associated with human cancer?
5. The viral nucleocapsid is the combination of
6. Edward Jenner began inoculating humans with material from __________ lesions.
7. The viruses in an attenuated vaccine
8. Enveloped viruses have a __________ shape.
9. The envelope of which of the following viruses is derived from the host cell nucleus?
10. Which of the following is semi-continuous (diploid) cell line?
11. Plant viruses may be cultivated in
12. The oncogene theory refers to
13. In cell culture, measles virus may lead to
14. A change from lysogeny to lysis is generally induced by
15. The viral DNA is removed from the host's chromosomes and the lytic cycle occurs. The process is called
16. The lysogenic state is governed by the activity of the regulatory region of the lambda phage genomes; this region is termed as
17. The capsomeres consist of a number of proteins subunits or molecules called
18. In order for a virus to replicate
19. Which of the following viruses belong to family Flaviviridae?
20. Which of the following viruses show/s transformation of infected cells?
21. Which of the following may affect proteins and nucleic acids, but not viruses?
22. 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
23. Which of the following statements is not true of viruses?
24. Which of the following viruses belong/s to family caliciviridae?
25. In the simplest capsid, there is a capsomere at each of the 12 vertices; this capsomere, which is surrounded by five other capsomeres, is termed a