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15 terms

Biology 111 Quiz # 10

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Viruses that have infected a cell and re-emerge during stress are termed ________ viruses.
latent
One way in which retroviruses differ from all other types of viruses is that retroviruses?
have the enzyme reverse transcriptase
Which of the following is/are NOT legitimate structures for a natural virus genome?
double stranded, DNA, double stranded RNA, single stranded DNA, single stranded RNA
All infectious organisms can be considered viruses.
False
The infectious cycle of HIV includes all of the following steps except
the immediate killing of the host cell.
Most viruses form a capsid around the nucleic acid core. The capsid is composed of
protein
The direction of genetic information transfer in a retrovirus (such as HIV) is
RNA to DNA to mRNA to protien
The process by which viruses destroy host cells upon release is called
cytolysis
The specific blood cells that HIV attaches to are the ____ cells
helper T cells
Each HIV particle possess ___ in its envelop, called gp 120, that precisely fits a cell-surface marker protein called CD4 on the surfaces of the immune system cells.
spikes
As clinically defined, AIDS is often accompanied by
lung infections and other opportunistic infections
HIV studies revealed that it is closely related to
a chimpanzee virus
The HIV spike responsible for binding the target cell is termed
gp120
The outer layer of some viruses consisting of both a host cell membrane plus viral proteins is termed a(n)
envelope
Viruses are characterized by all of the following except?
capable of independent reproduction