27. The temperate phage that have no site specificity for insertion and may even be able to insert multiple copies of their DNA into a single bacterial chromosome is
28. Enzyme neuraminidase is carried by which of the following viruses?
29. Lysozyme (an endolysin) which will lyse the bacterial cell, releasing the mature virions is present in
30. Which of the following is continuous cell line?
31. The repressor protein, since the cell is resistant to lysis from externally infecting phage, is also called
32. Which of the following virus is susceptible to chloroform?
33. Group E phages have
34. The temperate phage possesses a gene that codes for a repressor protein which makes the cell resistant to lysis initiated by
35. The bacterial viruses having head made up of large capsomeres, but no tail is morphologically classified as
36. The most complex type of bacterial viruses having hexagonal head, a rigid tail with a contractile sheath and tall fibers is morphologically classified as
37. Which of the following is not true of virions?
38. Bacteriophages have been used widely in genetic research, since they are the smallest and simplest biological entities capable of
39. Lesions on chorioallantoic membrane are produced by
40. Which one is not useful in the treatment of viruses except
41. 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
42. What kind of embryo is often used for viral assays?
43. The envelope of an enveloped virus is derived from
44. The most popular indirect method of counting virus particles is by
45. Which of the following viruses belong to family Hepadnaviridae?
46. Inclusion bodies of measles virus are
47. The most efficient way to enclose a space is within a/an
48. Which of the following is an example of rod-shaped viruses having their capsomeres arranged helically and not in the stacked ring?
49. During the first 10 minutes after injection of phage DNA, no phage can be recovered by disrupting the infected bacterium. This is termed as