Flashcards in Ch 13 Test Deck (24):
Put the terms in order, from the simplest to most complex: virion, capsomer, capsid, nucleocapsid
capsomer, capsid, nucleocapsid, virion
Ebola virus, which has an RNA genome, infects endothelial cells that line blood vessels. Within these infected cells, synthesis of viral proteins takes place
NOT VIRAL RIBOSOMES THAT ARE RELEASED FOLLOWING UNCOATING OF THE CAPSID
Infections with enveloped animal virus may have persistent infections because ____ allows the cells to stay alive longer and shed virions.
Put the stages of the Lytic Replication cycle in order, from earliest to latest stages: synthesis, assembly, attachment, release, entry, bacterial chromosome degraded
attachment, entry, bacterial chromosome degraded, synthesis, assembly, release
Reverse transcriptase is associated with which virus?
How are prions different from all other known infectious agents
they lack nucleic acid
Which is not true about the HIV provirus and a temperate prophage?
NOT: THE HIV PROVIRUS INFECTS ANIMAL CELLS AND THE PROPHAGE INFECTS BACTERIA
Which agents are capable of inducing conversion of a prophage back to a lytic phage?
UV light and X rays
Host specificity for attachment is determined both by viral proteins and host ____.
Type of nucleic acid, envelope, shape, and size are all used to ____ a virus.
In the phage lytic replication cycle, areas of dead lysed bacteria cells are called _____.
Viroids infect _____ and viroid-like agents infect ___.
Outside the cell, Ebola is called _____, inside the cell it is called ___.
Ebola virus is an enveloped virus that acquires its outer covering when _____.
an envelope is acquired during budding release through a host cell's membrane.
The three viral shapes are
helical, polyhedral, complex
In terms of size, bacteria are in the _____ range and viruses are in the _____ range
Which type of animal virus requires an RNA-dependent RNA transcriptase before proteins can be translated
Plant diseases can be caused by infectious RNA molecules lacking capsids
Which statement concerning viruses is not true?
viruses enter a cell to complete the replication they have begun outside the cell
Bacteriophage genes that cause toxin production in a possibly otherwise harmless bacterial species are examples of
some viruses have an outer membrane called an ____
viruses contain ___ or ____ but not both
____ ____ virus was the first virus to be discovered and characterized