WV SE:8 1. Which enzyme removes the lambda viral DNA from the host DNA once the
ID: 273088 • Letter: W
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WV SE:8 1. Which enzyme removes the lambda viral DNA from the host DNA once the repressor molecules are removed or no longer active? b) ligase c) lipase d) nuclease 42 Which enzyme destroys the host DNA once a cell is infected with a virus? a) DNAase b) RNAase c) Reverse transcriptase d) None of the above 43. True or False The enzyme lysozyme helps a phage break through the bacterial cell wall. 44. The induction of a temperate phage can be achieved by exposing the bacterial cells to ultra violet light. This is probably the result of a) destroying the repressor molecules and allowing RNA polymerase to bind to the promoter region and transcribing a messenger RNA. bj destroying the cell wall of the host c) destroying the virus d) all of the above Gese 45.Viroids contain cnly single stranded RNA and cause disease in plants b) use reverse transcriptase in their replication care similar in structure to phages d) can cause human diseases 4 Animal viuses can be classified according to lipid count g) Gemome type,shage and presence of an envelope 4) None of the aboveExplanation / Answer
41. a. excisase enzyme
42. a. DNAse
43. True, virus has lysozyme in its tail, which helps in breakage of cell wall.
44. a. destroys the repressor molecule.
45. a. viroid contain solely a short strand of circular, single-stranded RNA without protein coat. And known to cause disease in plants only.
46. c. genome type, shape and presence of an envelope.
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