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Biology Ch. 25
Viruses
30
Science
Not Applicable
01/14/2004

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Cards

Term
acyclovir
Definition
an antiviral drug
Term
antiviral drug
Definition
drugs that interfere with viral nucleic acid synthesis
Term
attenuated strain
Definition
refers to a preparation of a virus for a vaccine in which the virus is incapble of causing disease under normal circumstances
Term
azidothymine (AZT)
Definition
an ativiral drug that inhabbits the reverse transcriptase of retroviruses, such as HIV
Term
bacteriophage
Definition
a virus that infects bacteria
Term
capsid
Definition
the protien coat covering a virus
Term
envalope
Definition
a membrane-like struture outside the capsid that is made mostly of lipids and taken from a host cell membrane during replication
Term
glycoprotien
Definition
a molecule of protien with attached sugar chains
Term
helix
Definition
a viral shape resembling a coiled spring
Term
Human immunodeficiency virus (HIV)
Definition
the virus that causes AIDS
Term
isoahedron
Definition
a polyhedron or a capsid of a virus with 20 triangular faces
Term
inactivated vaccine
Definition
a vaccine that has been trated so that its componet microorganisms no longer have the ability to cause disease
Term
infectious disease
Definition
a disease caused by a pathogen that can be transmitted from one individual to another
Term
lysis
Definition
the distintegration of a cell by disruption of the plasma membrane
Term
lysogenic cycle
Definition
a virial replication process that does not kill the host cell immediately but stays inside of the host cell for a long period of time
Term
lytic cycle
Definition
the replication process of a virus that results in the distrution of the cell
Term
obligate intracular parcite
Definition
a paracite that require a host cell in order to reproduce
Term
prion
Definition
a glycoprotie particle implicated in diseases with long incubation periods
Term
prophge
Definition
an intracular bacteriophae hat is harmless to the host cell
Term
protease inhibitor
Definition
an antivarl drug the interfears with the synthesis of viral capsids during viral replication: in combintion with AZT has shown some promise in treating patients with HIV
Term
provirus
Definition
a viral DNA molecule produced by reverse transcriptase
Term
receptor site
Definition
the area of a cell membrane where antigen attchment akes place
Term
retrovirus
Definition
a virus such as HIV, that contains RNA and reverse transcriptase
Term
reverse transcriptase
Definition
an enzyme that make DNA from and RNA template
Term
T cell
Definition
a thymus-derived lympocyte that helps stimulate an immune response agianst an antiged and can attack certain antigans
Term
temperate
Definition
refering to a nonvirulent virus, rarely cousng disaese: moderate, not ubject to prolanged extreams of hot or cold
Term
viroid
Definition
a short, single strand of RNA that coses disease in plants
Term
virology
Definition
the study of viruses
Term
virulent
Definition
disease causing and highly infectios
Term
virus
Definition
a nonliving infectious particle composed of a nucleic acid and a prtien coat
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