In which of the following patterns of viral replication, viruses enter a cell, replicate and then cause the cell to burst, releasing new viruses? |
|||||||
a) |
Lytic |
b) |
Lysogenic |
c) |
Repreogenic |
d) |
Both (a) and (b) |
In which of the following patterns of viral replication, viruses enter a cell, replicate and then cause the cell to burst, releasing new viruses? |
|||||||
a) |
Lytic |
b) |
Lysogenic |
c) |
Repreogenic |
d) |
Both (a) and (b) |
(a)
In the lytic cycle, a virus enters a cell and causes it to produce viral nucleic acid and protein coats. After this viral parts are assembled, the new virus particles may burst from the host cell or may leave the host cell by budding. In the lysogenic cycle, viruses enter into a long-term relationship with the cells they infect, their nucleic acid replicate as the cells multiply.
Potato leaf roll or leaf curl of papaya are caused by |
|||||||
a) |
Fungi |
b) |
Viruses |
c) |
Bacteria |
d) |
Nematodes |
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